Some Biological Aspects of Bigeye Scad, Selar crumenophthalmus from Bangaa Faru, Maldives

Abstract

In this paper, we studied some biological aspects of big eye scad (Selar crumenophthalmus) from Maldives. The fish sample was collected from the local fish market at Bangaa Faru, Male, Maldives. The length of the samples were ranged from 7.7 cm to 24.5 cm (mean value = 16.85 ± 2.82 cm) in fork length. Body weight ranged between 8 g to 255.6 g (mean value = 87.76 ± 40.41 g). The exponent values (b slope) of lengthweight relationship of S. crumenophthalmus are 2.9838 for females and 2.7687 for males; indicating negative allometric growth pattern for both sexes. Synchronous reproductive behaviour was observed in both sexes and a pronounced peak of Gonadosomatic index was observed in females in January 2013. It is estimated that length at first maturity (L50) for females is at 19.39 cm FL and for males at 21.76 cm FL. Our result also suggest that big eye scad have a reduced swimming capability, resulting the species to be easily caught. Careful planning and management should be implemented to prevent the big eye scad from being overfished.

Preliminary Report on the Size-specific Variation in Length-weight Relationship, Relative Condition Factor, and Gonad Maturation of Bigeye Scad Selar crumenopthalmus (Bloch, 1793) in the northern Sulu Sea, Philippines

“…Furthermore, it had been found that a male S. crumenopthalmus matured earlier than a female. The same has been reported by Iwai et al (1996) and Clarke and Privitera (1995) but the results of Fadzly et al (2017) show otherwise while Gallardo-Cabello et al (2017) reported that both sexes attain sexual maturity at almost the same size.…”

Karakteristik Biologi Dan Laju Eksploitasi Ikan Pelagis Kecil Di Perairan Utara Jawa

“…Hal ini menunjukkan bahwa kondisi serupa tidak hanya terjadi di perairan utara Jawa saja tetapi juga di perairan utara Gorontalo. Bahkan, hasil penelitian Fadzly et al (2017) di perairan Bangaa Faru, Maldives juga menyatakan bahwa dari 1648 ekor ikan selar bentong yang diteliti, hampir 70% pada kondisi belum matang gonad.…”

Biologi Kematangan Gonad Tiga Spesies Utama Pelagis Kecil Yang Mendarat Di Bitung

“…Sedangkan musim pemijahan hasil penelitian di Laut Jawa terjadi pada bulan Desember -Februari (musim barat) (Atmaja et al, 1995), sedangkan penelitian yang dilakukan di perairan sekitar Semarang, musim pemijahan terjadi pada April hingga Juni (Siwat et al, 2016). Musim pemijahan ikan S. crumenophthalmus di Bangaa Faru, Maladewa mempunyai puncak musim pada bulan Januari (Fadzly et al, 2017). Penelitian terhadap ikan R. kanagurta di perairan Rembang, Jawa Tengah menunjukkan bahwa musim pemijahan terjadi pada Maret dan Desember (Pralampita & Chodriyah, 2010), sedangkan penelitian yang dilakukan oleh Suwarso et al, (2008) terhadap spesies ikan pelagis kecil di Laut Cina Selatan menunukkan bahwa musim pemijahan dimulai sejak musim timur dan berlangsung sampai dengan musim peralihan.…”