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Ecological modeling using stable isotopes combined with network analysis provides a holistic view of how different trophic pathways support the productivity of fishery species. The yellow snapper Lutjanus argentiventris is a species with high abundance and frequency in mangrove creeks of the central Pacific, Colombia, where it remains in its juvenile stages and has a high fisheries importance. Stable isotopes (δ13C and δ15N) and network analysis were used to analyze the food web of this species in a mangrove estuarine system. We collected 75 specimens of three size classes, small (4 to < 10 cm), medium (10–20 cm), subadults (> 20 cm). The snappers δ13C values were between –25.8 to –21.4‰ and between 9.3 to 11.2‰ for δ15N. We also analyzed 226 isotopic data from prey specimens (> 20): omnivorous-shrimps, detritivore-shrimps, herbivore-crabs, omnivore carnivore-crabs, porcelain-crabs, benthic and subtidal fish. Prey values for δ13C were between –27.5 to –19.1‰ and for δ15N between 2.1 to 10.0‰. Smaller-size juveniles were different in δ13C compared with medium-size juveniles and subadults; which didn’t show differences between them. Trophic position (TP) of all specimens was between 3.6 and 4.1, with few variations between size classes, indicating that L. argentiventris is a predator moving between the third and fourth TP. Simmr analysis for all specimens indicated that the highest probability contribution were from benthic fish (x = 28% BCI:12–42%), detritivore shrimps (x = 25% BCI:13–35%) and subtidal fish (x = 12% BCI:2–24%). The network analysis showed that the food web involving L.

argentriventris consists of 16 trophogroups and a total of 72 connections tending to be homogeneous. A modularity analysis showed that there are four trophic communities along this food web. This work provides evidence that the mangrove food web is highly complex despite only modeling a single top predator species.

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기사명 저자명 페이지 원문 목차
Length-weight relationship and condition factors of native freshwater fishes in the Hajar Mountain, Oman Saud M. Al Jufaili, Aziza Saud Al Adhoobi, Humaid Darwish Al Mamari, Sara Yahya Al Hinai p. 439-450
Growth performance, survival rate, and percentage of male freshwater crayfish (Cherax quadricarinatus) with Tribulus terrestris extract Munti Sarida, Ahmad Ade Rifki, Miftah Saifulloh, Yeni Elisdiana, Deny Sapto Chondro Utomo, Yudha Trinoegraha Adiputra, Yan Evan p. 451-460
Trophic pathways supporting a marine-estuarine-dependent species of fishery importance in the eastern Pacific Diana Medina-Contreras, Camila Guevara-Torres, Johnatan Estrada-Padilla, Manuel Zetina-Rejón, Alberto Sánchez-González, Jaime Cantera-Kintz p. 461-477
Effect of extreme pH levels on early larval stages of the Pacific abalone (Haliotis discus hannai Ino, 1953) Dian Yuni Pratiwi, Irfan Zidni, Mi-Jin Choi, Young Dae Oh, Tae Min Kim, Han Kyu Lim p. 478-490
Industrial breeding and domestication of mandarin fish (Siniperca chuatsi) in Tianjin, China Xin Luo, Wei Zhang, Yuanyuan Dai, Lin Ma, Qikang Bo, Hongzheng You, Hongqing Sun, Houfu Liu, Jufeng Jiang, Zhongzhi Chen p. 491-500
Functional feed with Euglena sp. : a novel approach to growth and metabolic health in Rasbora lateristriata Khusnul Qonita Maghfiroh, Bambang Retnoaji, Arief Budiman, Eko Agus Suyono p. 501-513

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