Characterizing trophic interactions of a catfish dominated tropical reservoir ecosystem to assess the effects of management practices

Panikkar, Preetha; Khan, M. Feroz; Desai, V R; Shrivastava, N. P.; Sharma, A. P.

doi:10.1007/s10641-014-0255-6

Cited by 16 publications

(5 citation statements)

References 26 publications

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“…In the waters around Qeshm Island, values of 0.14 and 0.15 were obtained for these two indices. OI values of 0.16 and 0.19 were reported in studies on the Rabisankar reservoir (Pannikar et al, 2014) and the northern and central Arabian Sea (Coll et al, 2006), corresponding to those obtained in this study.…”

Section: Discussionsupporting

confidence: 89%

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Trophic structure using ecological relationships between five dominant commercial fish in Kolahi to Dargahan

et al. 2023

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The purpose of this study was to determine the effects of frequent species population fluctuations and the impact of different rates of exploitation on other ecological links in the food web. The mass-balanced Ecopath model represents the trophic interactions among the 31 defined functional groups in the Kolahi to Dargahan area, with five main species, including Trichiurus lepturus, Saurida tumbil, Nemipterus japonicus, Sillago sihama, and Cynoglossus arel (from April 2018 to April 2019). To investigate the effects of fishing and environmental disturbances, the Ecopath modeling approach combines software for analyzing ecosystem trophic-level balances with population dynamic models. In the past 5 years, Hormozgan province has caught more than 45% of the benthic fish caught off the northern coasts of the Persian Gulf. From Kolahi to Dargahan, one of the most important fishing grounds in this province's southeast is located. Food web models are used to represent a marine system's current state, assess stock levels, and predict change over time. Over a year, the first five dominant fish in the study area, S. tumbil, S. sihama, C. arel, N. japonicus, and T. lepturus, were biometrically measured, and their population dynamics parameters as well as feeding ecology indices were analyzed. According to the trophic-level index results, the five most common species studied in this study belonged to the third (N. Japonicas, S. sihama, and C. arel) and fourth (T. lepturus, and S. tumbil) trophic levels. The key species with the greatest impact on other groups of studied species were identified as S. tumbil and T. lepturus, respectively. The estimated ecosystem indicators were the system operational power (75846.797), the primary production/respiration ratio (0.034), the connectance index (0.159), and the system omnivory index (0.253). A pedigree index (PI) of 0.38 was estimated for the present model. Overexploitation of T. lepturus could disrupt the aquatic food web and adversely affect the long-term sustainable use of aquatic resources, according to data. As a result, ecosystem-based fisheries management should be implemented to find a more appropriate solution to sustainable exploitation in the studied habitat, an important fishing area in the Persian Gulf's north.

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Section: Discussionsupporting

confidence: 89%

“…The importance of MTI is in explaining interactions between trophic groups in diet‐based models (Behera et al, 2020; Pannikar et al, 2014). In this study, lower trophic levels such as detritus, phytoplankton, other zooplankton, and Mollusca influenced most of the groups in the food web.…”

Section: Discussionmentioning

confidence: 99%

Trophic structure using ecological relationships between five dominant commercial fish in Kolahi to Dargahan

et al. 2023

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“…The exotics to IMC ratio in 2010-11 was 4:3 which gradually changed to 1:3 in 2017-18. The foodweb model of Manchanbele reservoir showed a CI value of 0.31 that is comparable with the values of Ravishankarsagar reservoir (Panikkar et al, 2015a) as depicted in Table 1. This shows that the presence of exotics may not adversely affect the resilience of the ecosystem.…”

Section: Impact Of Invasive Fish On the 'Health' Of An Ecosystemsupporting

confidence: 74%

Changing foodwebs of Indian aquatic ecosystems under the threats of invasive species: An overview

Panikkar

Khan

Sarkar

et al. 2021

Aquatic Ecosystem Health &Amp; Management

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Biological invasions are a worldwide threat to the aquatic systems and have the potential to homogenize entire foodwebs and shift species abundance distributions to more skewed ones. Invasion impacts include effects on the foodweb structure and ecosystem functioning leading to a loss in native fish biodiversity and commercially important fisheries in many open water systems. The impacts of invasives are generally devastating as they spread in the foodweb with each species potentially interacting with multiple species. The foodweb modeling studies conducted in different inland aquatic ecosystems show that not all exotics cause a detrimental effect on the resilience of an ecosystem. Information on the foodweb structure and ecosystem properties is a prerequisite for formulating management protocols for conserving biodiversity, enhancement programmes and sustaining fisheries. The present paper reviews the impacts of invasive fishes in Indian aquatic ecosystems in the context of a changing foodweb scenario due to exotic fish species invasions. The information generated here could be applied for future research on similar ecosystems for deducing management actions.

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“…The natural food of the fishes under this work has been studied in various research works by examination of the gastrointestinal contents [42][43][44][45][46][47] and it was revealed that they were planktivorous. Analysis of gut contents of C. mrigala indicated that apart from debris and decaying matter, Bacillariophyceae and Chlorophyceae were the dominant group.…”

Section: Discussionmentioning

confidence: 99%

Enzymatic Profiling and Feeding Preferences of Catla: Catla catla, Rohu: Labeo rohita and Mrigala: Cirrhinus mrigala in Rural Polyculture Ponds

Singh¹,

Bhatnagar²,

Kalla³

et al. 2018

J Aquac Res Development

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Characterizing trophic interactions of a catfish dominated tropical reservoir ecosystem to assess the effects of management practices

Cited by 16 publications

References 26 publications

Trophic structure using ecological relationships between five dominant commercial fish in Kolahi to Dargahan

Trophic structure using ecological relationships between five dominant commercial fish in Kolahi to Dargahan

Changing foodwebs of Indian aquatic ecosystems under the threats of invasive species: An overview

Enzymatic Profiling and Feeding Preferences of Catla: Catla catla, Rohu: Labeo rohita and Mrigala: Cirrhinus mrigala in Rural Polyculture Ponds

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