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Full-Text Articles in Animal Sciences
Temporal Variation In The Reproductive Pattern Of Blood Cockle Anadara Antiquata From Pakistan (Northern Arabian Sea), Shahnaz Jahangir, Ghazala Siddiqui, Zarrien Ayub
Temporal Variation In The Reproductive Pattern Of Blood Cockle Anadara Antiquata From Pakistan (Northern Arabian Sea), Shahnaz Jahangir, Ghazala Siddiqui, Zarrien Ayub
Turkish Journal of Zoology
Sex ratios, size frequency, and reproductive patterns of blood cockle Anadara antiquata were studied from Sonmiani and Phitti Creek, Pakistan, from May 2004 to April 2005. At both sites, the overall sex ratio was significantly in favor of females. The population of A. antiquata at Sonmiani consisted of cockles of 31-80 mm in size and that at Phitti Creek of 21-100 mm in size; however, the majority of specimens were of 51-70 mm in size at both sites. Four stages of gametogenesis were identified in male and female cockles: 1) developing, 2) ripe, 3) spawned out, and 4) resorbing. No …
Reproductive Cycle Of The Traditionally Exploited Sea Cucumber Holothuria Tubulosa (Holothuroidea: Aspidochirotida) In Pagasitikos Gulf, Western Aegean Sea, Greece, Georgios Kazanidis, Alexios Lolas, Dimitris Vafidis
Reproductive Cycle Of The Traditionally Exploited Sea Cucumber Holothuria Tubulosa (Holothuroidea: Aspidochirotida) In Pagasitikos Gulf, Western Aegean Sea, Greece, Georgios Kazanidis, Alexios Lolas, Dimitris Vafidis
Turkish Journal of Zoology
The reproductive cycle of the traditionally exploited sea cucumber Holothuria tubulosa was investigated in the Pagasitikos Gulf (39°18'457\"N, 23°05'869\"E) from June 2007 to July 2008. The study examined the microscopic characteristics of the gonads and was based on maturity index (MI) and oocytes' size-frequency distribution. The reproductive cycle was found to be synchronous between sexes, following an annual pattern. The minimum MI values were recorded in December and January, marking the onset of the reproductive cycle. During the spring, MI increased due to gamete development and proliferation. Mature specimens were prominent in summer while spawning occurred between July and September. …