The spatial distribution and community structure of the fishes were studied at different depths and sites along the Jordanian coast in seagrass habitat. A total of 37,034 fishes were counted representing 132 species b...The spatial distribution and community structure of the fishes were studied at different depths and sites along the Jordanian coast in seagrass habitat. A total of 37,034 fishes were counted representing 132 species belonging to 35 families observed during visual census in three sites (average of 4741.6 fish per transect). Out of the 132 species encountered, 5 species of them including Neopomacentrus miryae Lethrinus borbonicus, Pseudanthias squamipinnis, Lethrinus variegatus, Siganus rivulatus accounted for 57.7% of all individuals. Fishes were most abundant and significantly higher at 12 m depths (mean N = 2889.6) in comparison with shallow 6m depth (mean = 1225.3 with (p = 0.0218). This may be attributed to many plank-tivorous fishes that inhabit this depth such as P. squampinnis, Paracheilinus octotaenia, Chromis pelloura, Decapterus macarellus, and Cirrhilabrus rubriventralis probably with high abundance of plankton at 12 m depth than 6 m. The number of species was significantly higher in Phosphate Loading Berth (PLB;mean S = 54.7) than in Hotels area site (HA;mean S = 12.8) with (p = 0.0002) and Tala Bay site (TB;mean S = 31) with (p = 0.0484). This may be due to higher hard coral cover at Phophate Loading Berth.展开更多
Fishes of the family Carangidae, Decapterus macarellus, Decapterus macrosoma, and Decapterus russelli, were collected from the Jordanian Aqaba coast during 2008-2009 for the determination of their metal concentrations...Fishes of the family Carangidae, Decapterus macarellus, Decapterus macrosoma, and Decapterus russelli, were collected from the Jordanian Aqaba coast during 2008-2009 for the determination of their metal concentrations in various organs (muscle, liver, kidney, gonads, gills, and stomach food contents) using flame atomic absorption spectrometry (AAS). The results showed significant differences in metal concentration between species. The present study indicated significant differences of heavy metal elements among different organs of the same species. The results did not reveal any significant differences between male and female organs, and the only significant difference were found for Pb in Decapterus macorsoma and for Cu in Decapterus russelli. The low metal concentrations found in muscle tissue (in all studied species) has implications for human health.展开更多
文摘The spatial distribution and community structure of the fishes were studied at different depths and sites along the Jordanian coast in seagrass habitat. A total of 37,034 fishes were counted representing 132 species belonging to 35 families observed during visual census in three sites (average of 4741.6 fish per transect). Out of the 132 species encountered, 5 species of them including Neopomacentrus miryae Lethrinus borbonicus, Pseudanthias squamipinnis, Lethrinus variegatus, Siganus rivulatus accounted for 57.7% of all individuals. Fishes were most abundant and significantly higher at 12 m depths (mean N = 2889.6) in comparison with shallow 6m depth (mean = 1225.3 with (p = 0.0218). This may be attributed to many plank-tivorous fishes that inhabit this depth such as P. squampinnis, Paracheilinus octotaenia, Chromis pelloura, Decapterus macarellus, and Cirrhilabrus rubriventralis probably with high abundance of plankton at 12 m depth than 6 m. The number of species was significantly higher in Phosphate Loading Berth (PLB;mean S = 54.7) than in Hotels area site (HA;mean S = 12.8) with (p = 0.0002) and Tala Bay site (TB;mean S = 31) with (p = 0.0484). This may be due to higher hard coral cover at Phophate Loading Berth.
文摘Fishes of the family Carangidae, Decapterus macarellus, Decapterus macrosoma, and Decapterus russelli, were collected from the Jordanian Aqaba coast during 2008-2009 for the determination of their metal concentrations in various organs (muscle, liver, kidney, gonads, gills, and stomach food contents) using flame atomic absorption spectrometry (AAS). The results showed significant differences in metal concentration between species. The present study indicated significant differences of heavy metal elements among different organs of the same species. The results did not reveal any significant differences between male and female organs, and the only significant difference were found for Pb in Decapterus macorsoma and for Cu in Decapterus russelli. The low metal concentrations found in muscle tissue (in all studied species) has implications for human health.
