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The physics of New Zealand’s shelf seas: introduction to the special issue N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-01-31 Craig L. Stevens; Joe O’Callaghan; Stephen M. Chiswell; Moninya Roughan
(2021). The physics of New Zealand’s shelf seas: introduction to the special issue. New Zealand Journal of Marine and Freshwater Research: Vol. 55, Special issue: The physics of New Zealand’s shelf seas. Guest Editors: Craig Stevens, Joe O’Callaghan, Stephen Chiswell and Moninya Roughan, pp. 1-5.
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Sea temperature rise over the period 2002–2020 in Pelorus Sound, New Zealand – with possible implications for the aquaculture industry N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-01-21 Niall Broekhuizen; David R. Plew; Matt. H. Pinkerton; Mark. G. Gall
ABSTRACT We assembled water-temperature data (1.0–15 m depth horizon) from several field studies (spanning 2003–2020) within Pelorus Sound to generate composite time-series of temperature at four locations. We also examined satellite-sensed sea-surface temperature records for the region (2002–2019). Time-series were deseasoned and Sen-slopes were calculated as measures of long-term trend. All of the
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Long-term trends in the frequency and magnitude of upwelling along the West Coast of the South Island, New Zealand, and the impact on primary production N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-01-13 Stephen M. Chiswell; Joanne M. O’Callaghan
ABSTRACT Satellite-derived estimates of sea surface temperature (SST), chlorophyll (Chl), and fluorescence line height (FLH), from 22 sites ∼20 km offshore from the West Coast of the South Island, New Zealand (WCSI) are used to investigate long-term trends in SST, the frequency and magnitude of cool and warm events, and their impacts on SSC and FLH. WCSI trends have been towards higher temperature
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Frontal dynamics and water mass variability on the Campbell Plateau N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-02-18 Aitana Forcén-Vázquez; Michael J. M. Williams; Melissa Bowen; Lionel Carter; Helen Bostock
ABSTRACT The Campbell Plateau is a dominating bathymetric feature of New Zealand’s subantarctic region, strongly influencing the dynamics of both the Subtropical Front (STF) to the north and the Subantarctic Front (SAF) to the south. We present a consistent survey across New Zealand’s subantarctic of the relationships between front positions, bathymetry and water masses. The northwest side of the Campbell
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Long-term variability in deposited fine sediment and macroinvertebrate communities across different land-use intensities in a regional set of New Zealand rivers N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-02-15 Noah G. Davis; Roger Hodson; Christoph D. Matthaei
ABSTRACT Macroinvertebrate communities in running waters are commonly used as bioindicators of fine sediment pollution, but few studies evaluate impacts across multiple years. We used a 5-year dataset from 46 rivers in Southland, New Zealand to investigate the consistency of the relationship between deposited fine sediment and stream macroinvertebrates across three categories of agricultural land-use
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Habitat use of the amphidromous catfish Genidens barbus: first insights at its southern distribution limit N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-02-12 Esteban Avigliano; Jorge Pisonero; Ana Méndez; Andrea Tombari; Alejandra V. Volpedo
ABSTRACT White sea catfish Genidens barbus is an endangered amphidromous species distributed between northeastern Brazil and northern Argentine Patagonia, whose migratory behaviour at the southern end of its range is unknown. Here, the migratory patterns of this species were studied including marine and freshwater (Patagonian stock) environments via otolith core-to-edge Sr/Ca and Ba/Ca profiles. Based
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Effects of point source discharges on common bully (Gobiomorphus cotidianus) along the Waikato River, New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-02-12 David W. West; Nicholas Ling; Brendan J. Hicks; Michael R. van den Heuvel; Louis A. Tremblay
ABSTRACT The common bully (Gobiomorphus cotidianus) was used as a bioindicator to assess the impacts of geothermal, bleached kraft mill effluent (BKME), sewage, and thermal discharges in the Waikato River, Northern New Zealand. A range of morphological and physiological parameters were measured to assess fitness in fish sampled upstream and downstream from these point sources. Isotopic signatures gave
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Long-term trends in the frequency and magnitude of upwelling along the West Coast of the South Island, New Zealand, and the impact on primary production N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-01-13 Stephen M. Chiswell; Joanne M. O’Callaghan
ABSTRACT Satellite-derived estimates of sea surface temperature (SST), chlorophyll (Chl), and fluorescence line height (FLH), from 22 sites ∼20 km offshore from the West Coast of the South Island, New Zealand (WCSI) are used to investigate long-term trends in SST, the frequency and magnitude of cool and warm events, and their impacts on SSC and FLH. WCSI trends have been towards higher temperature
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Cetacean sighting records in the New Caledonia Basin, Tasman Sea, New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-01-13 Katharina J. Peters; Karen A. Stockin
ABSTRACT The distribution of marine mammal species in many areas remains poorly understood, especially as observations for some taxa are rare and large-scale surveys are time consuming and extremely costly. Here, we present 36 records of 7 cetacean species (Balaenoptera brydei, B. musculus subspp., Delphinus delphis, Globicephala sp., Grampus griseus, Physeter macrocephalus, Pseudorca crassidens) in
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Influence of habitat on meiofaunal abundance and distribution in a New Zealand temperate estuary N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2021-01-11 Shaneel S. Sharma; Andrea C. Alfaro; Kathleen A. Campbell
ABSTRACT Meiofaunal assemblages are often overlooked, yet they are important ecological components of estuarine ecosystems. To evaluate variations in meiofaunal communities in estuarine habitats, we conducted a comprehensive analysis of meiofaunal density, distribution and relationships with environmental parameters in a mangrove-dominated ecosystem at Mangawhai, Northern New Zealand, in summer (March)
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Comparison of bathyscope and snorkelling methods for iwi monitoring of kākahi (Echyridella menziesi) populations in the shallow littorals of Lake Rotorua and Rotoiti N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-12-17 Sioḃhan H. Nuri; Ian A. Kusabs; Ian C. Duggan
ABSTRACT Kākahi (Echyridella spp.) are freshwater cultural keystone species in New Zealand; they represent a valuable mahinga kai (species used as a food) resource and have high cultural significance to Māori, particularly to the Te Arawa and Ngāti Tūwharetoa iwi (tribal groups). Population densities of kākahi are thought to have declined in many locations in New Zealand, and accurate assessment methods
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Aquatic disease in New Zealand: synthesis and future directions N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-12-14 Henry S. Lane; Cara L. Brosnahan; Robert Poulin
ABSTRACT Dedicated studies on aquatic disease in New Zealand began in 1974, inspired by a developing aquaculture industry. Since then, two main aquatic disease study areas have emerged: (1) aquatic disease ecology and (2) diseases of commercial species. Progress over the past 20-years has been made by only a small number of researchers and aquatic disease in New Zealand has not received much attention
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The influence of topography and land use on hydrological and nutrient dynamics in two Andean streams from Northern Patagonia N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-12-13 Alejandro Sosnovsky; Mailén Elizabeth Lallement; Magalí Rechencq; Eduardo Enrique Zattara; María Valeria Fernández; Sergio Leiva; María José Suárez; Romina Daga; Rodolfo Juan Carlos Cantet
ABSTRACT Fluvial dynamics are driven by multiple environmental factors and scales. Studies coupling hydrological and nutrient dynamics of mountain streams are almost non-existent in the Northern Patagonian region; which is characterised by a temperate-cold climate. We studied two adjacent streams with contrasting drainage basins: Casa de Piedra (41°07′30.11″S 71°27′13.16″W), which originates in a small
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Sedimentary phosphorus in contrasting, shallow New Zealand lakes and its effect on water quality N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-11-30 Sean Waters; Piet Verburg; Marc Schallenberg; David Kelly
ABSTRACT The eutrophication of lake ecosystems due to anthropogenic activities has impacted lakes worldwide and shallow lakes are particularly vulnerable. The retention of phosphorus (P) in lake sediments and its subsequent release to the water column is often a key factor in degraded water quality, algal blooms and delayed responses to lake restoration efforts. Despite this link between sedimentary
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Observations of salinity, flushing time and dispersion in the Waitemata Estuary N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-11-25 Zheng Chen; Melissa M. Bowen
ABSTRACT The physical behaviour of estuaries controls the transport of substances from freshwater to the ocean. We conducted the first investigation of salinity distribution and its response to spring-neap tides and freshwater flow rates in the Waitemata Estuary, and estimated several estuarine parameters. Four surveys were conducted: two surveys were conducted in summer during spring-tide, low flow
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Induction of metallothionein in the common bully (Gobiomorphus cotidianus) from the Motueka River N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-11-25 Louis A. Tremblay; Katherine Trought; Thomas J. Sheehan; Robin J. P. Holmes; Andrew Barrick; Roger G. Young
ABSTRACT The Motueka catchment is a major river system in the South Island, New Zealand, typically considered to be of ‘good water quality’. The catchment has high metal inputs originating from a mineral belt in the headwaters. This study investigated the induction of metallothionein (MT) in the common bully, Gobiomorphus cotidianus, to assess exposure to trace metal contamination in the Motueka River
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Life histories of two hyperbenthic mysids (Mysidacea: Mysidae) in an open estuary N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-11-19 Beate M. Bierschenk; Carolyn W. Burns; Marc Schallenberg; Gerard P. Closs
ABSTRACT Mysidae are widely distributed in aquatic ecosystems and form a large proportion of the hyperbenthic biomass in estuaries. The seasonality, spatial distribution and reproductive biology of the two hyperbenthic mysid species, Tenagomysis chiltoni and Tenagomysis novaezealandiae, were studied in an open estuary. Sampling was conducted bi-monthly at night between February 2008 and April 2009
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Distribution of little penguins (Eudyptula minor) along the greater Kaikōura coastline, New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-11-19 Chloe Paulet Cargill; Alastair Gordon Judkins; Jody Suzanne Weir
ABSTRACT The identification and subsequent protection of suitable breeding habitat for little penguins (Eudyptula minor) is restricted by data deficiency across large stretches of the species range. For example, presence/absence data is lacking for much of the Canterbury coast, mainland New Zealand. In October 2019, a Protected Species Detection Dog was used to conduct the first comprehensive survey
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Review of life history parameters and preliminary age estimates of some New Zealand deep-sea fishes N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-11-19 Peter J. McMillan; Alan C. Hart; Peter L. Horn; Dianne M. Tracey; Caoimhghin Ó Maolagáin; Brittany Finucci; Matthew R. Dunn
ABSTRACT A literature review on longevity of New Zealand deep-sea fishes provided life history parameter estimates for 17 bony and five cartilaginous species. Preliminary age estimates for a further nine deep-sea bony fishes were made from otolith zone counts and included results from a pilot analysis of radiocarbon age estimates from the otoliths of three of the species. Radiocarbon age estimates
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Congruence in stable isotope values among two sympatric freshwater mussel species in northern New Zealand streams N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-10-19 Kevin J. Collier; Michele Melchior
ABSTRACT We measured δ15N, δ13C, and percent carbon (C) and nitrogen (N) on foot and remaining soft tissue of the two native freshwater mussel species Echyridella aucklandica and E. menziesii (Hyriidae: Unionida) from three Waikato, northern New Zealand, streams to investigate differences among sites, sexes and species. Mean differences in δ15N and δ13C between foot and remaining soft tissue (mainly
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Characterisation of constructed ponds and factors influencing their macroinvertebrate communities on the lower Waikato River floodplain, New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-10-12 Jeremy Garrett-Walker; Kevin J. Collier
ABSTRACT Ponds are increasingly being constructed to enhance amenity values in human-dominated lowland landscapes, but little is known of design features that influence macroinvertebrates which can provide important food resources for fish and waterbirds. We quantified pond characteristics, sampled benthic and water-column macroinvertebrates in winter, and related abundance, biomass and community composition
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Age structure, recruitment variation, and sex ratio in blue cod (Parapercis colias) subpopulations in New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-09-30 Michael Peter Beentjes
ABSTRACT Age compositions from eight blue cod (Parapercis colias) subpopulations off the South Island of New Zealand were compared to investigate recruitment patterns temporally and spatially. Findings indicate (1) recruitment is highly variable between years, (2) subpopulations closer to each other have similar age compositions, and (3) strong and weak recruitment events are linked and the key processes
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Analysis of spatial and temporal variations in bacterial community dynamics within stream biofilms N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-08-31 Anju Gautam; Gavin Lear; Gillian D. Lewis
Stream biofilms play an important ecological role in the supply of energy and organic matter to aquatic food webs. Bacterial community composition in stream biofilms is shaped by biotic interactions as well as physicochemical conditions which vary across space and time. However, knowledge of the relative importance of spatial versus temporal factors for microbial community composition is lacking. Here
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The release of legacy phosphorus from deforestation-derived sediments in shallow, coastal lake Forsyth/Te Roto o Wairewa N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-08-18 Sean Waters; Jenny G. Webster-Brown; Ian Hawes
Phosphorus (P) release from sediments accumulating since catchment deforestation, has been linked to algal blooms which have occurred in Lake Wairewa (Canterbury, NZ) for over a century. However, the mechanisms controlling this internal P loading are poorly understood. To address this issue, we investigated sediment P fractions, P release, dissolved oxygen (DO) and pH at the sediment–water interface
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Recolonisation of a fish and invertebrate community in a wetland following a drought: the importance of deep water refugia N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-08-09 Rose E. Stuart; Travis Ingram; Gerard P. Closs
Wetland restoration or re-establishment is a common conservation goal, and the ability of a wetland community to recover from events such as drought are key to its long-term success. At the mouth of the Waiau River in Southland, New Zealand, a series of wetland ponds have been created by diverting water from the river. A period of particularly low river flows resulted in the wetland drying out entirely
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High contribution of methane in greenhouse gas emissions from a eutrophic lake: a mass balance synthesis N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-08-06 Arianto B. Santoso; David P. Hamilton; Louis A. Schipper; Ilia S. Ostrovsky; Chris H. Hendy
Lakes are ‘hotspots’ for greenhouse gas (GHG) emissions, primarily carbon dioxide (CO2) and methane (CH4). Understanding the processes regulating GHG emissions from lakes, and their temporal variability, is essential for more accurately quantifying the role of lakes in global GHG cycles. In this study, we identified the processes that affect CO2 and CH4 concentrations in a small (0.3 km2) eutrophic
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Correlations between environmental conditions and Vibrio parahaemolyticus or Vibrio vulnificus in Pacific oysters from New Zealand coastal waters N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-08-04 Nicola J. King; Sarah Pirikahu; Graham C. Fletcher; Isabelle Pattis; Brian Roughan; Anne-Marie Perchec Merien
Vibrio parahaemolyticus and Vibrio vulnificus can be found in oysters in coastal environments. Vibrio vulnificus can induce life-threatening illness when ingested with oysters, while V. parahaemolyticus usually causes self-limiting gastroenteritis. This study investigated correlations between concentrations of these Vibrio species in Pacific oysters from eight New Zealand coastal regions (2008–2017)
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Characterisation of the expression of select genes in response to key marine pollutants in the triplefin Forsterygion capito N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-07-29 Diana Montenegro; Louis A. Tremblay; Zoë Hilton; Gavin Lear
Biomarkers in receptor species can be used to assess and monitor ecosystem health. This study aimed to develop mRNA biomarkers in the New Zealand triplefin Forsterygion capito and validate their induction in response to common estuarine contaminants. The targeted genes were cytochrome P450 1A (cyp1a), metallothionein (mt), vitellogenin (vtg), and cytochrome P450 aromatase (cyp19b). Fish were treated
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Preface: land-use impacts on aquatic ecosystems - tribute to John Quinn N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-07-19 Scott Larned; Kevin Collier; Clive Howard-Williams
(2020). Preface: land-use impacts on aquatic ecosystems - tribute to John Quinn. New Zealand Journal of Marine and Freshwater Research: Vol. 54, Special issue: Land-use impacts on aquatic ecosystems: evidence and solutions —Tribute to John Quinn, pp. 305-307.
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Sediment-related water quality of small hill-country streams near Whatawhata, New Zealand. Response to integrated catchment management (ICM) N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-05-13 Rob Davies-Colley; Andrew Hughes
Degradation of aquatic ecosystems by fine sediment is a global environmental problem, and damages reflect particle properties as well as mass concentration. We studied sediment-related water quality (SRWQ) of small streams in hill-country near Whatawhata, NZ, that have been monitored since 1995. In 2001, an integrated catchment management (ICM) plan was implemented in the Mangaotama (originally sheep-beef)
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Current state of water quality indicators in urban streams in New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-05-13 Jennifer Gadd; Ton Snelder; Caroline Fraser; Amy Whitehead
National assessments have highlighted that urban streams have some of the poorest water quality in New Zealand, yet there has been no analysis focussing on these streams. In this study we defined urban streams as >15% catchment urban land cover and used monitoring data to assess several indicators of water quality including dissolved metals, nutrients, bacteria and the macroinvertebrate community index
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Incorporating Māori values into land management decision tools N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-06-10 Shannan K. Crow; Gail T. Tipa; Kyle D. Nelson; Amy L. Whitehead
Environmental sustainability and the long-term wellbeing of Māori (the indigenous people of New Zealand) are interdependent and degradation of landscapes risks the progressive degradation of Māori wellbeing. The present study developed an analysis framework based on Ki Uta Ki Tai (holistic-mountains to the sea- management philosophy advocated by Ngāi Tahu) for exploring relationships between landcover
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Community turnover provides insight into variable invertebrate recovery between restored streams with different integrated catchment management plans N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-06-21 Sharon Elizabeth Graham; John Martin Quinn
Understanding temporal patterns in restored environments is important for identifying potential barriers to recovery and improved management of degraded habitats. In this paper, we use temporal beta diversity analyses to compare invertebrate community recovery trajectories in three restored agricultural stream sites under different integrated catchment plans, a native forest reference site, and two
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Nitrogen loads to New Zealand aquatic receiving environments: comparison with regulatory criteria N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-05-13 Ton H. Snelder; Amy L. Whitehead; Caroline Fraser; Scott T. Larned; Marc Schallenberg
There is concern about the deteriorating nutrient status of aquatic receiving environments in New Zealand. We estimated the amount by which current nitrogen (N) concentrations and loads exceed criteria in rivers, lakes and estuaries nationally. Criteria corresponded to national ‘bottom-line’ (i.e. minimal) environmental objectives set by government policy. Three metrics were evaluated: (1) degree of
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A modelling synthesis of the volume flux through Cook Strait N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-07-09 Mark G. Hadfield; Craig L. Stevens
ABSTRACT We present hindcasts of currents in Cook Strait from a baroclinic, tide-resolving ocean model. Three hindcasts are run, forced respectively at the lateral boundaries with data from the Bluelink Reanalysis (BRAN), the global Hybrid Coordinate Ocean Model (HYCOM) and a New Zealand Shelf Seas baroclinic hindcast (NZROMS). The hindcast forced by BRAN is evaluated against measured currents at locations
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Benthic macroinvertebrate assemblages of a stream-lake network in the upper zone of the trans-Andean basin of the Valdivia River (Chile) N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-07-07 Jacqueline Salvo; Claudio Valdovinos; Pablo Fierro
Stream-lake networks include multiple transition zones between lake-like and river-like conditions. This study analysed environmental features, macroinvertebrate assemblages (MIB) and functional feeding groups in outlet, inlet and tributary streams (i.e. streams other than the main stem) of a stream-lake network in Chilean Andean lakes, to verify if lake outlets reflect an ecotone condition. Permutational
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Overview of the comb jellies (Ctenophora) from the South-western Atlantic and Sub Antarctic region (32–60°S; 34–70°W) N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-06-25 Agustín Schiariti; Maria Sofía Dutto; Otto M. Oliveira; Gabriela Faillia Siquier; Francisco Alejandro Puente Tapia; Luciano Chiaverano
Ctenophora are important components of marine ecosystems. However, the South-western Atlantic and Sub Antarctic region are still one of the least studied region in the world. We report the species composition and spatial distribution of Ctenophora and reviewed the studies performed in this region. New data obtained between 1910 and 2019, encompassing an area of c. 7 million km2 (32–60°S, 34–70°W) were
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Decadal population dynamics of an intertidal bivalve (Austrovenus stutchburyi) bed: pre- and post- a mass mortality event N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-06-10 Karen A. Tricklebank; Roger V. Grace; Conrad A. Pilditch
Three independent annual surveys with some spatial–temporal overlap were amalgamated to describe the population dynamics of the New Zealand intertidal cockle (Austrovenus stutchburyi) at Lews Bay, Whangateau Harbour from 1997–2018. After more than a decade of relative stability there was a dramatic decline in the biomass (from 7.4 to 1.8 kg wet weight m−2), density (1049 to 409 individuals m−2) and
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The magnitude and frequency of storm surge in southern New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-06-04 Ryan J. Adam; Michael J. Hilton; Tim Jowett; Wayne J. Stephenson
There is currently little understanding regarding storm surge in New Zealand, particularly in the southern region. To date, there has been no attempt to establish the frequency and magnitude of storm surge using observed sea level data on the open coast. The aim of this study is to examine the nature of storm surge in southern New Zealand and explore the influence of the Southern Annular Mode (SAM)
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Seasonal reproduction of the blue mussel (Mytilus galloprovincialis) from two locations in southern New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-05-18 Daniel C. Smart; Samuel Heenan; P. Mark Lokman; Miles D. Lamare
Blue mussels, Mytilus galloprovincialis, are a widespread and ecologically important species in New Zealand coastal ecosystems, yet, there is limited information on the seasonality and variability in reproduction among populations. The reproductive cycle of M. galloprovincialis was studied monthly over 1-year in two southern New Zealand populations (Aramoana (45.7787°S, 170.7037°E) and Timaru (44.3905°S
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The effects of broodstock generation on ova fatty acid profile in Giant Kokopu Galaxias argenteus N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-05-13 Luu Huong Hoang; Julian Lilkendey; Armagan Sabetian
The ability of different broodstock generations to provision lipids to their gametes is often overlooked in aquacultured freshwater fish. In this study we investigated the ability of two generations (F1 & F2) of Giant Kokopu (Galaxias argenteus) to provision fatty acids into their eggs. Here we show that eggs of captive-bred females (F2) displayed different relative fatty acid concentrations compared
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New Zealand aquaculture industry: research, opportunities and constraints for integrative multitrophic farming N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-05-03 Jeanette M. E. Stenton-Dozey; Philip Heath; Jeffrey S. Ren; Leo N. Zamora
The New Zealand aquaculture industry is based primarily on the production of Greenshell™ mussels, Chinook salmon and Pacific oysters. The industry is primed for development and is anticipating increasing its export earnings to NZ$3 billion by 2035. To achieve this target and retain its ‘clean and green’ image, the industry must be able to demonstrate that its practices are sustainable. Integrated multi-trophic
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The stream hydrology response of converting a headwater pasture catchment to Pinus radiata plantation N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-04-20 Andrew O. Hughes; Rob Davies-Colley; Margaret Bellingham; Gareth van Assema
The planting of degraded land with tree plantations may be effective at improving land use sustainability and profitability but it can also have significant effects on stream hydrology. In this paired catchment study, we report the stream hydrological response to partial (62%) afforestation of a steep pastoral catchment in the western Waikato Region, North Island, New Zealand. We comprehensively analyse
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Species assemblage and recruitment patterns of echinoderms on shallow rocky reefs in central New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-01-29 Andrea Glockner-Fagetti; Nicole E. Phillips
Echinoderms play important ecological roles in the benthic community, but the processes that regulate their distribution are still poorly understood. The aim of this study was to describe the community structure in the shallow rocky reefs of the Wellington region of central New Zealand. Five sites from a harbour and an open coast were surveyed for adult echinoderm density and habitat composition. Additionally
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A genetic assessment of the taxonomic status of New Zealand mussels of the genus Xenostrobus Wilson, 1967 N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-01-29 Donald J. Colgan; Richard C. Willan; Lisa A. Kirkendale
The genus Xenostrobus consists of small, marine and estuarine mussels that all appear similar externally. One of its estuarine species, Xenostrobus securis, with a native range in New Zealand and Australia, has become invasive in the Northern Hemisphere. No genetic data are available to determine if X. securis populations from the two countries are conspecific. Additionally, marine Xenostrobus from
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Genetic structure and recent population expansion in the commercially harvested deep-sea decapod, Metanephrops challengeri (Crustacea: Decapoda) N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-01-23 Alexander J. F. Verry; Kerry Walton; Ian D. Tuck; Peter A. Ritchie
Determining the genetic structure and population dynamics of harvested species are key aspects of effective fisheries management. New Zealand scampi (Metanephrops challengeri) is a species of nethropid lobster that supports a commercial fishery on the continental shelf and slope around New Zealand. To determine the genetic structure and historical population demography of New Zealand scampi, we sequenced
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Microplastic pollution in urban streams across New Zealand: concentrations, composition and implications N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-12-17 Aidan K. Mora-Teddy; Christoph D. Matthaei
Microplastic pollution in aquatic systems has been reported globally at an alarming rate, with an increasing number of documented negative biological consequences. Research on microplastic pollution in freshwaters has barely begun in New Zealand, and few studies from smaller lotic systems such as streams exist globally. We investigated the extent of microplastic pollution within urban streams across
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Otolith shape as a stock discrimination tool for ling (Genypterus blacodes) in the fjords of Chilean Patagonia N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-12-12 Rodrigo Wiff; Andrés Flores; Angel M. Segura; Mauricio A. Barrientos; Vilma Ojeda
Genypterus blacodes, in terms of its fishing history and local economic importance, is an emblematic species harvested in Chilean Patagonia (41°00’–57°00’S). Most of the current fisheries and biological knowledge of this species come from the open ocean, whereas information about the species in fjords and inner channels is fragmentary. In 2018, two research surveys targeting G. blacodes were conducted
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Community volunteer assessment of recreational water quality in the Hutt River, Wellington N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-12-11 Amanda E. Valois; Juliet R. Milne; Mark W. Heath; Rob J. Davies-Colley; Emily Martin; Rebecca Stott
Water is an important component of many recreational opportunities and New Zealand invests significant resources in recreational water quality (RWQ) monitoring to assess risks to public health. However, monitoring primarily focuses on microbiological hazards and RWQ is considerably broader than this. The goal of this study was to take a comprehensive approach to evaluating RWQ while exploring the potential
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High levels of site fidelity in movement patterns of Southern Rock Lobster (Jasus edwardsii) in Victoria, Australia N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-11-14 Alexandra Skeer; Adrian Linnane; David Reilly; Charlie Huveneers
Movement patterns of the Southern Rock Lobster Jasus edwardsii in Victoria, Australia were investigated from 8,533 tag-recapture events across a 20-year period (1992–2012). In total, 83% of lobsters were recaptured within 1 km of their tagging site and 93% within 5 km. While largely resident, elevated movements were observed within specific regions, with the overall direction of movement being from
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Acoustically estimated size distribution of sperm whales (Physeter macrocephalus) off the east coast of New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-11-17 Giacomo Giorli; Kimberly T. Goetz
ABSTRACT The length-frequency distribution of sperm whales (Physeter macrocephalus) was studied on the east coast of NZ using passive acoustic recorders moored offshore of Kaikoura, Cape Palliser and Castlepoint. Sperm whale’s echolocation signals are unique among odontocete species. Their clicks are composed by multiple pulses resulting from the sound transmission within the whale head. The total
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First record of Bonnemaisonia hamifera (Bonnemaisoniales, Rhodophyta) in the South Pacific, from the South Island of New Zealand N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-10-06 David J. Garbary; Roberta D’Archino; Brendan Flack; Christopher D. Hepburn; Wendy A. Nelson; Daniel Pritchard; Judy. E. Sutherland
The tetrasporophytic ‘Trailliella’ stage of the red algal genus Bonnemaisonia is reported for the first time from the Southern Hemisphere. Here we describe a bloom of the tetrasporophyte of B. hamifera from the mouth of the Waikouaiti River, Karitāne, South Island, where it occurred as thousands of free-floating tufts up to 1 cm wide in shallow water, accumulated in windrows on sand banks and beaches
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Evaluation of food competition and resource partitioning of recruiting fish with permanent residents in a seagrass habitat N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2019-09-08 Craig A. Meakin; Jian G. Qin
Recruiting King George whiting Sillaginodes punctatus were studied to assess the potential for food competition with permanent resident fish species in a nursery habitat. Marine migrant post larval S. punctatus (<60 mm TL) consumed primarily harpacticoid copepods and had high (>0.6) diet overlap with permanent resident fish species Favonigobius leteralis and Stigmatopora nigra. Food electivity index
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Dynamics of phosphorus exchange between sediment and water in a gravel-bed river N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-29 Robert J. Wilcock; Richard W. McDowell; John M. Quinn; J. Christopher Rutherford; Roger G. Young; Craig V. Depree
Phosphorus (P) stores in gravel-bed rivers are released for uptake by periphyton when pH levels exceed 8.5. The Tukituki River has low alkalinity water and frequently experiences periphyton blooms, and daytime pH > 9 during summer low-flows. We measured dissolved reactive P (DRP) and EPC0, the water concentration of DRP at which no net release or sorption from the river bed occurs, in sediment samples
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Spatio-temporal variation in species composition of New Zealand's whitebait fishery N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-25 Mark R. Yungnickel; Michael J. H. Hickford; David R. Schiel
Whitebait comprise a culturally, commercially and recreationally important fishery in New Zealand, where post-larvae are netted while returning from their marine phase. In this study, we expanded an historical (1964) sampling programme to gain a contemporary understanding of the species composition of the whitebait fishery; 87 rivers were sampled over six months in 2015. Over the entire country, >12
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Nutrient attenuation in a shallow, gravel-bed river. I. In-situ chamber experiments N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-25 John M. Quinn; J. Christopher Rutherford; Sherry J. Schiff
Dissolved nutrient uptake and metabolism by periphyton in a central North Island gravel-bed river were investigated using recirculating in-situ chambers. Dissolved inorganic nitrogen (DIN) uptake was correlated with photosynthesis and chlorophyll but N uptake and carbon fixation were partly de-coupled indicating storage. Dissolved reactive phosphorus (DRP) uptake was only weakly correlated with photosynthesis
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Nutrient attenuation in a shallow, gravel-bed river. II. Spatial and temporal changes in nitrogen dynamics and community metabolism N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-18 J. Christopher Rutherford; Roger G. Young; John M. Quinn; Robert J. Wilcock
Instream processes alter the concentration and bioavailability of nutrients as they are transported downstream. By relating primary production and periphyton composition to changes in nutrient concentration in a gravel-bed river this study made inferences about recycling and attenuation. Where dissolved inorganic nitrogen (DIN) was abundant, concentrations decreased linearly with distance but by less
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Reviewing the far-reaching ecological impacts of human-induced terrigenous sedimentation on shallow marine ecosystems in a northern-New Zealand embayment N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-18 John D. Booth
Human settlement in Bay of Islands, New Zealand, beginning ∼1300 AD, wrought immense, conspicuous and enduring change to local shallow-water marine ecologies, this review addressing those transformations attributable to increased rates of anthropogenically induced, land-derived sedimentation. Elevated silt inflow, particularly after the late-1800s, in course led to ∼130% expansion in mangrove (Avicennia
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Effects of agricultural and urban land cover on New Zealand’s estuarine water quality N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-01 Bruce D. Dudley; Olivia R. Burge; David Plew; John Zeldis
National-scale analyses of land cover effects on water quality can aid in directing environmental policy. We compiled a coastal water quality database for New Zealand comprising 320 estuarine and coastal sites with records between 2013 and 2018. Previous literature had shown strong effects of agricultural and urban land cover on the quality of New Zealand’s rivers, so we examined their effects on estuaries
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Reference and current Trophic Level Index of New Zealand lakes: benchmarks to inform lake management and assessment N. Z. J. Mar. Freshw. Res. (IF 1.4) Pub Date : 2020-03-01 Jonathan M. Abell; Paul van Dam-Bates; Deniz Özkundakci; David P. Hamilton
Knowledge of trophic status is fundamental to understanding the condition and function of lake ecosystems. We developed regression models to predict chlorophyll a concentrations (chl a) in New Zealand lakes for reference and current states, based on an existing dataset of total nitrogen (TN) and total phosphorus (TP) concentrations for 1031 lakes. Models were then developed to predict Secchi depth