在巴拿马太平洋地区一个新的筑巢地卡斯卡希洛索海滩,橄榄栉水母的筑巢活动和人工遮荫的影响

IF 1.5 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY
Eric E. Flores, Joelbin Rafael De La Cruz
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引用次数: 0

摘要

新监测海滩上的海龟筑巢活动可为未来的区域和全球保护评估提供重要数据支持。在此,我们根据一个新孵化场在 2019、2020 和 2021 年的数据,报告了太平洋巴拿马卡斯卡希洛索海滩的橄榄海龟(Lepidochelys olivacea)筑巢活动。此外,我们还进行了一项现场实验,分析人工遮荫与无遮荫处理对孵化幼体生物特征、孵化成功率、孵化成功率和孵化期的影响。对三个季节的分析表明,根据转移到孵化场的卵数,筑巢活动在 9 月(33%)和 10 月(25%)之间达到高峰。筑巢雌鱼的弯曲躯体长度(CCL)(64.3-66.2 厘米)与东热带太平洋(ETP)其他种群相似。2019年的窝产卵数为80枚,2020年为73枚,2021年为108枚;但与东热带太平洋其他种群相比,窝产卵数略少(93.92 ± 18.78枚)。这可能是该海滩筑巢雌鸟的表型差异。2020 年期间,由于 COVID19 的限制,将一窝卵转移到孵化场的能力受到了影响。孵化期间的暴雨导致环境温度降低,导致人工遮荫和无遮荫处理下的巢温较低(最高平均 29.9°C)。这可能会导致 2020 年孵化季节孵化出雄性幼体。我们的实验巢温度较高,孵出的幼体较重,这与一般假设相反,但这也仅与40毫米临界值之后的躯干长度有关。在人工遮荫下孵化的幼体能够长到一定大小,但可能要以储存较少的质量为代价(权衡利弊)。需要持续的海滩巡逻和孵化场管理技术以及长期的基线数据收集,以确保最近调查的这片海滩的橄榄海狮筑巢种群的安全。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nesting activity of Lepidochelys olivacea, and the effect of artificial shade at Cascajilloso beach, a newly inhabited nesting site in Pacific Panama

Sea turtle nesting activity on newly monitored beaches yield important data to support future regional and global conservation assessments. Here, we report on nesting activity of Olive Ridley (Lepidochelys olivacea) at Cascajilloso beach in Pacific Panama based on data from a new hatchery during seasons 2019, 2020 and 2021. Further to this, we conducted a field experiment analyzing the effects of artificial shade versus unshaded treatments on hatchlings' biometric characteristics, hatching success, incubation success and the incubation period. The analyses of three seasons showed that nesting activity, based on number of egg clutches transferred to the hatchery, reached a peak between September (33%) and October (25%). Curved carapace length (CCL) of nesting females (64.3–66.2 cm) was similar to other populations of the Eastern Tropical Pacific (ETP). The number of eggs clutches were 80 in 2019, 73 in 2020 and 108 in 2021; however, the clutch size was slightly smaller (93.92 ± 18.78 eggs) compared with other populations of the ETP. This could be a phenotypic variation of nesting females at this beach. The ability to move egg clutches to the hatchery was affected during 2020 season due to COVID19 restrictions. Heavy rainfall during the incubation period caused a reduction in ambient temperature resulting in cooler (maximum average 29.9°C) nest temperatures registered under artificial shade and unshaded treatments. This could result in males hatchlings during the 2020 season. The warmer temperatures in our experimental nests produced heavier hatchlings contrary to general assumptions, but this was also related to straight carapace length only after a threshold value of 40 mm. Hatchlings under the artificial shade were able to grow to a certain size but potentially at the costs of storing less mass (trade-off). Ongoing beach patrolling and hatchery management techniques with long-term baseline data collection are needed to secure the nesting population of L. olivacea in this recently surveyed beach.

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来源期刊
Marine Ecology-An Evolutionary Perspective
Marine Ecology-An Evolutionary Perspective 生物-海洋与淡水生物学
CiteScore
2.70
自引率
0.00%
发文量
37
审稿时长
>12 weeks
期刊介绍: Marine Ecology publishes original contributions on the structure and dynamics of marine benthic and pelagic ecosystems, communities and populations, and on the critical links between ecology and the evolution of marine organisms. The journal prioritizes contributions elucidating fundamental aspects of species interaction and adaptation to the environment through integration of information from various organizational levels (molecules to ecosystems) and different disciplines (molecular biology, genetics, biochemistry, physiology, marine biology, natural history, geography, oceanography, palaeontology and modelling) as viewed from an ecological perspective. The journal also focuses on population genetic processes, evolution of life histories, morphological traits and behaviour, historical ecology and biogeography, macro-ecology and seascape ecology, palaeo-ecological reconstruction, and ecological changes due to introduction of new biota, human pressure or environmental change. Most applied marine science, including fisheries biology, aquaculture, natural-products chemistry, toxicology, and local pollution studies lie outside the scope of the journal. Papers should address ecological questions that would be of interest to a worldwide readership of ecologists; papers of mostly local interest, including descriptions of flora and fauna, taxonomic descriptions, and range extensions will not be considered.
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