The role of feeding morphology and competition in governing the diet breadth of sympatric stomatopod crustaceans

deVries, Maya S

doi:10.1098/rsbl.2017.0055

Cited by 22 publications

(11 citation statements)

References 18 publications

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“…This lack of correspondence to the ecological theory of adaptive radiation [ 36 , 138 , 139 ] joins examples across a variety of taxa that counter the long-standing hypothesis that specialized morphology corresponds to a specialist diet. Possibly, such situations might be more frequent than previously thought [ 140 ]. Multiple niche axes along different environmental gradients appear to structure Lake Trout diversity within Great Bear Lake.…”

Section: Discussionmentioning

confidence: 99%

From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?

et al. 2018

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Depth is usually considered the main driver of Lake Trout intraspecific diversity across lakes in North America. Given that Great Bear Lake is one of the largest and deepest freshwater systems in North America, we predicted that Lake Trout intraspecific diversity to be organized along a depth axis within this system. Thus, we investigated whether a deep-water morph of Lake Trout co-existed with four shallow-water morphs previously described in Great Bear Lake. Morphology, neutral genetic variation, isotopic niches, and life-history traits of Lake Trout across depths (0–150 m) were compared among morphs. Due to the propensity of Lake Trout with high levels of morphological diversity to occupy multiple habitat niches, a novel multivariate grouping method using a suite of composite variables was applied in addition to two other commonly used grouping methods to classify individuals. Depth alone did not explain Lake Trout diversity in Great Bear Lake; a distinct fifth deep-water morph was not found. Rather, Lake Trout diversity followed an ecological continuum, with some evidence for adaptation to local conditions in deep-water habitat. Overall, trout caught from deep-water showed low levels of genetic and phenotypic differentiation from shallow-water trout, and displayed higher lipid content (C:N ratio) and occupied a higher trophic level that suggested an potential increase of piscivory (including cannibalism) than the previously described four morphs. Why phenotypic divergence between shallow- and deep-water Lake Trout was low is unknown, especially when the potential for phenotypic variation should be high in deep and large Great Bear Lake. Given that variation in complexity of freshwater environments has dramatic consequences for divergence, variation in the complexity in Great Bear Lake (i.e., shallow being more complex than deep), may explain the observed dichotomy in the expression of intraspecific phenotypic diversity between shallow- vs. deep-water habitats. The ambiguity surrounding mechanisms driving divergence of Lake Trout in Great Bear Lake should be seen as reflective of the highly variable nature of ecological opportunity and divergent natural selection itself.

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Section: Discussionmentioning

confidence: 99%

From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?

et al. 2018

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“…5,13 Our discrimination factors, that are at the extreme ends of typical ranges, indicate that the use of taxon-specific values would be a better approach if they are available. However, in some cases, this has little influence on model results, 101 and in the absence of these values broadening standard deviations represents a suitable alternative.…”

Section: Discussionmentioning

confidence: 99%

Diet‐tissue discrimination and turnover of δ¹³C and δ¹⁵N in muscle tissue of a penaeid prawn

Hewitt

Taylor

Raoult

et al. 2021

Rapid Comm Mass Spectrometry

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Stable isotopes are used to study trophic and movement ecology in aquatic systems, as they provide spatially distinct, time-integrated signatures of diet.Stable isotope ecology has been used to quantify species-habitat relationships in many important fisheries species (e.g., penaeid prawns), with approaches that typically assume constant values for diet-tissue discrimination and diet-tissue steady state, but these can be highly variable. Here we provide the first report of these processes in Metapenaeus macleayi (eastern school prawn).Methods: Here we explicitly measure and model carbon (δ 13 C) and nitrogen (δ 15 N) diet-tissue discrimination and turnover in eastern school prawn muscle tissue as a function of experimental time following a change in diet to an isotopically distinct food source.Results: Diet-tissue discrimination factors were 5 and 0.6‰ for δ 13 C and δ 15 N, respectively. Prawn muscle tissue reached an approximate steady state after approximately 50 and 30 days for δ 13 C and δ 15 N. Half-lives indicated faster turnover of δ 15 N ($8 days) than δ 13 C ($14 days).Conclusions: Our diet-tissue discrimination factors deviate from 'typical' values with larger values for carbon than nitrogen isotopes, but are generally similar to those measured in other crustaceans. Similarly, our estimates of isotopic turnover align with those in other penaeid species. These findings confirm muscle tissue as a reliable indicator of long-term diet and movement patterns in eastern school prawn. | INTRODUCTIONStable isotope analysis is often used to study trophic relationships, as it provides a time-integrated estimation of assimilated organic matter, 1 and is most useful when dietary sources are isotopically distinct. Given the general observation that the isotopic compositions of consumer tissues are similar to the isotopic composition of their diet, 2-4 stable isotope analysis has been widely applied in ecology to quantify the structure and function of food-webs, 5,6 but has also been used to reconstruct movement patterns in various species, such as residency and migration. 1,[7][8][9][10][11][12] Information derived from stable isotope analysis has supported the study of linkages between species and their habitats, 5,13,14 and supported parametrisation of trophic and fishery models. [15][16][17] Robust application of stable isotope analysis requires knowledge of the relationship between the isotopic composition of an animal's diet and the tissue being measured. 18 Two key factors affecting this relationship are: diet-tissue discrimination (sometimes referred to as 'trophic enrichment' or 'fractionation'), a process whereby heavier or lighter isotopes accumulate in consumer (i.e., animal) tissues differentially, [19][20][21][22] and the rate at which isotope ratios of consumer tissues come to reflect that of their sources (i.e., food), hereafter 'isotopic turnover'. 18,23 These processes are primarily driven by growth and metabolism (i.e., anabolic and catabolic turnover). [24][25][26][27] Many studies that reconstruc...

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“…Ritonga et al (2017) juga menambahkan kondisi mangrove dan prediksi produksi hasil penangkapan memiliki hubungan yang positif dan signifikan. Selain itu, faktor lain seperti pola makan pada udang mantis famili squillidae (Dingle dan Caldwell, 1978;Huang et al, 2015;DeVries et al, 2016;DeVries, 2017) dan persaingan dalam kompetisi memperoleh nutrisi (DeVries et al, 2012;Patek et al, 2004), serta kompetisi saat kawin/pemilihan pasangan (Caldwell dan Dingle, 1975).…”

Section: Hasilunclassified

Biologi reproduksi udang mantis Cloridopsis scorpio di ekosistem mangrove Belawan, Sumatera Utara

Dimenta

Machrizal

Khairul

et al. 2020

Depik

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Anthropogenic activities that tend to be exploitative in the mangrove ecosystem of Belawan are thought to have an impact on the biota associated with the ecosystem. One of the impacts is thought to be implied by mantis shrimp Cloridopsis scorpio (Latreile, 1828). The reproductive biology of the shrimp is the main object that needs to be studied in relation to the impacts. This study aims to determine the distribution of gonad maturity stage, gonad somatic index, and the length of the first mature of C. scorpio in the Mangrove Ecosystem of Belawan, North Sumatera. The research was conducted on March to May 2019 with a biweekly sampling period. The purposive random sampling was applied to choose three sampling stations in the research location. Mantis shrimp samples were caught using shrimp trawl. The result showed that the gonad maturity stage of males and females were dominated by Stage I. The gonad somatic index (GSI) range of males were 7.00-10.93 and female were 7.40-11.15. The GSI value of C. scorpio is closely related to its gonad maturity development. The length of the first mature (L50) of males were 205.50±10.65 mmBL and females were 186.0±10.48 mmBL.Keywords: Cloridopsis scorpio, Gonad maturity stage, Gonad somatic indeks, Length of the first mature ABSTRAKAktivitas antropogenik yang cenderung eksploitatif di kawasan ekosistem mangrove Belawan diduga telah berdampak terhadap biota-biota yang berasosiasi dengan ekosistem tersebut. Salah satu dampaknya dialami oleh udang mantis Cloridopsis scorpio (Latreile, 1828). Aspek reproduksi C. scorpio menjadi salah satu objek yang perlu dikaji berkaitan dengan dampak tersebut. Penelitian ini bertujuan untuk menganalisis sebaran tingkat kematangan gonad (TKG), indeks kematangan gonad (IKG), dan ukuran pertama kali matang gonad (L50) dari C. scorpio di ekosistem mangrove Belawan, Sumatera Utara. Penelitian dilakukan pada bulan Maret sampai Mei 2019 dengan periode pengambilan sampel dua mingguan. Metode purposive random sampling digunakan untuk menentukan tiga stasiun pengambilan sampel di lokasi penelitian. Sampel C. scorpio ditangkap menggunakan pukat udang. Hasil penelitian menunjukkan distribusi TKG C. scorpio jantan dan betina didominasi oleh TKG I. Nilai IKG C. scorpio jantan berkisar antara 7,00-10,93 dan C. scorpio betina berkisar antara 7,40-11,15. Nilai IKG C. scorpio berkaitan dengan tahap perkembangan gonadnya. C. scorpio jantan mengalami pertama kali matang gonad (L50) pada ukuran 205,50±10,65 mmBL dan C. scorpio betina pada ukuran 186,00±10,48 mmBL.Kata kunci: Cloridopsis scorpio, TKG, IKG, Ukuran pertama kali matang gonad

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The role of feeding morphology and competition in governing the diet breadth of sympatric stomatopod crustaceans

Cited by 22 publications

References 18 publications

From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?

From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?

Diet‐tissue discrimination and turnover of δ¹³C and δ¹⁵N in muscle tissue of a penaeid prawn

Biologi reproduksi udang mantis Cloridopsis scorpio di ekosistem mangrove Belawan, Sumatera Utara

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The role of feeding morphology and competition in governing the diet breadth of sympatric stomatopod crustaceans

Cited by 22 publications

References 18 publications

From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?

From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?

Diet‐tissue discrimination and turnover of δ13C and δ15N in muscle tissue of a penaeid prawn

Biologi reproduksi udang mantis Cloridopsis scorpio di ekosistem mangrove Belawan, Sumatera Utara

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Diet‐tissue discrimination and turnover of δ¹³C and δ¹⁵N in muscle tissue of a penaeid prawn