CO₂-level Dependent Effects of Ocean Acidification on Squid, Doryteuthis pealeii, Early Life History

الموضوعات

علوم بيئية

الملخص

Ocean acidification is predicted to lead to global oceanic decreases in pH of up to0.3 units within the next 100 years. However, those levels are already being reachedcurrently in coastal regions due to natural CO2 variability. Squid are a vital component ofthe pelagic ecosystem, holding a unique niche as a highly active predatory invertebrateand major prey stock for upper trophic levels. This study examined the effects of a rangeof ocean acidification regimes on the early life history of a coastal squid species, theAtlantic longfin squid, Doryteuthis pealeii. Eggs were raised in a flow-through oceanacidification system at CO2 levels ranging from ambient (400ppm) to 2200ppm. Time tohatching, hatching efficiency, and hatchling mantle lengths, yolk sac sizes, and statolithswere all examined to elucidate stress effects. Delays in hatching time of at least a daywere seen at exposures above 1300ppm in all trials under controlled conditions. Mantlelengths were significantly reduced at exposures above 1300 ppm. Yolk sac sizes variedbetween CO2 treatments, but no distinct pattern emerged. Statoliths were increasinglyporous and malformed as CO2 exposures increased, and were significantly reduced insurface area at exposures above 1300ppm. Doryteuthis pealeii appears to be able towithstand acidosis stress without major effects up to 1300ppm, but is strongly impactedpast that threshold. Since yolk consumption did not vary among treatments, it appearsthat during its early life stages, D. pealeii reallocates its available energy budget awayfrom somatic growth and system development in order to mitigate the stress of acidosis.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0f0cf410-8840-4677-8810-caafdfe55ac7

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1700448_1.pdf

بيانات النشر

ألقاب المؤلفين

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اللغة

English

المصدر والدورية

اسم المصدر

CO₂-level Dependent Effects of Ocean Acidification on Squid, Doryteuthis pealeii, Early Life History

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

CO₂ stress, Doryteuthis pealeii, energy budget, Ocean acidification, Squid, statoliths

إشراف وإعداد

الإشراف

مايكل بيرومين

الإعداد

كيسي زاكروف

الاقتباسات الببليوغرافية