Effect of climate change on the reproduction pattern of sea urchin Echinometra mathaei at the Gulf of Suez, Red Sea, Egypt.

Abstract

Reproduction global warming temperature Gulf of Suez The reproduction patterns of E. mathaei's population at the Gulf of Suez were investigated during two periods, the first was 1992-1993 and the second was 2015-2016. The effects of elevating temperature during these periods on reproduction periodicities were studied. The surface water temperature showed an increase during the period 2015-2016 by 1.36 o C at summer and 1.24 o C at winter from that recorded during 1992-1993. In 1992-1993, individuals of E. mathaei had one definite lengthy spawning season, which were expressed by main spawning period from June to August with maximum gonadal activity in July. On contrary, there was an obvious shift at the spawning season during 2015-2016; individuals of E. mathaei exhibit more than one breeding season. However, they are resting

Influences of habitat and seasonal changes on gonadal maturation of Echinometra mathaei (Echinodermata: Echinoidea) and Tridacna squamosa (Mollusca: Bivalvia) in the Red Sea, Egypt

“…The activities of marine benthic invertebrates have major biologic and geologic effects on a wide range of habitats in tropical and temperate environments (McClanahan & Muthiga, 2007 ). Changes in environmental factors coordinate reproduction of marine animals, which leads to seasonal reproductive cycles (Hasan, 2019 ; Mercier & Hamel, 2009 ). Studies of the reproduction of marine macrobenthos are important to determine their growth rate and the characteristics of the next generation.…”