Knowledge of the life history of populations at the warm edge of their distributional range can provide a better understanding of how they will adapt to climate warming, including potential poleward redistribution. The range of Gray Snapper Lutjanus griseus has the potential to expand along its northern temperate fringe, but little is known about this species in the warmest portion of its range. We studied the age, growth, reproduction, and mortality of commercially caught Gray Snapper in the Guatemalan Caribbean, where sea surface temperature consistently exceeds 26°C. Longevity was estimated as 10 years, and von Bertalanffy growth parameters that were consolidated through Bayesian estimation incorporating earlier estimates from the Caribbean region were as follows: asymptotic length (L_∞) was 35 cm, the growth coefficient (K) was 0.56 year⁻¹, and the theoretical age at zero length (t₀) was −0.7 year. Gray Snapper grew slowest in April, prior to the rainy season, and at the onset of the reproductive season, which lasted to September. Fifty percent of the Gray Snapper matured at 31 cm and at 3.5 years of age. Gray Snapper had a lower maximum size, longevity, and peak reproductive investment, a protracted spawning season and reproductive life span, and elevated natural mortality at the warm edge of their distribution relative to temperate climates. Despite the plasticity in life history of Gray Snapper observed in this study, their potential to further adapt to warming remains unknown.

中文翻译：

---

灰鲷在加勒比分布范围温暖边缘的生活史

了解处于分布范围最暖边缘的种群的生活史，可以更好地了解他们将如何适应气候变暖，包括潜在的极向性再分布。灰色鲷鱼Lutjanus griseus的范围有可能沿着其北部温带边缘扩展，但在其最温暖的部分对该物种知之甚少。我们研究了危地马拉加勒比海地区商业捕获的灰鲷的年龄，生长，繁殖和死亡率，该地区海面温度始终超过26°C。寿命估计为10年，通过贝叶斯估计合并了加勒比地区早期估计的von Bertalanffy生长参数如下：渐近长度（L_∞）为35 cm，生长系数（K）为₀ . 56年^-1，零长度（t ₀）时的理论年龄为-0 .7年。在雨季之前的四月份，以及在持续到九月份的繁殖季节开始之前，灰鲷鱼的生长速度最慢。50％的灰色鲷鱼在31厘米和3.5岁时成熟。灰鲷的最大体型，寿命和繁殖投资较低，产卵季节和繁殖寿命延长以及相对温带气候的分布暖缘自然死亡率较高。尽管在这项研究中观察到了灰色鲷鱼生活史上的可塑性，但它们进一步适应变暖的潜力仍然未知。