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opennotspecifiedMay 2023View details →

FIGURE 1 in Pseudolaguvia permaris, a new catfish from the Eastern Ghats of India (Teleostei: Sisoridae)

FIGURE 1. Pseudolaguvia permaris, holotype, ZSI/EBRC/F-14208, 26.6 mm SL; lateral, dorsal and ventral views.

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Chinook salmon digestion data within predatory largemouth bass and channel catfish through controlled feed trials

<p>Diet analysis is a vital tool for understanding trophic interactions and is frequently used to inform conservation and management. Molecular approaches can identify diet items that are impossible to distinguish using more traditional visual-based methods. Yet, our understanding of how different variables, such as predator species or prey ration size, influence molecular diet analysis is still incomplete. Here, we conducted a large feeding trial to assess the impact that ration size, predator species, and temperature had on digestion rates estimated with visual identification, qPCR, and metabarcoding. Our trial was conducted by feeding two rations of Chinook salmon (Oncorhynchus tshawytscha) to two piscivorous fish species (largemouth bass (Micropterus salmoides)) and channel catfish (Ictalurus punctatus)) held at two different temperatures (15.5°C and 18.5°C) and sacrificed at regular intervals up to 120 hours from the time of ingestion to quantify the prey contents remaining in the digestive tract. We found that ration size, temperature, and predator species all influenced digestion rate, with some indication that ration size had the largest influence. DNA based analyses were able to identify salmon smolt prey in predator gut samples for much longer than visual analysis (~12 hours for visual analysis versus ~72 hours for molecular analyses). Our study provides evidence that modeling the persistence of prey DNA in predator guts for molecular diet analyses may be feasible using a small set of controlling variables for many fish systems.</p>

opencc-zeroJun 2023View details →

FIGURE 3 in Glyptothorax viridis, a new species of catfish (Teleostei: Siluriformes: Sisoridae) from Manipur, India

FIGURE 3. Thoracic adhesive apparatus in Glyptothorax. A, G. viridis, ZSI FF 9463, holotype; B, G. ventrolineatus ZSI FF 7580, and C, G. trilineatus ZSI F 10380/1. Figures not to scale.

FIGURE 9 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 9. Left: G. galaxias: ~ 110 mm SL; uncatalogued, Iran: Behesht abad River; right: G. vatandousti: MNCN, 91 mm SL, Kangavar stream.

FIGURE 8 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 8. Glyptothorax vatandousti paratypes; from left: AJRPC 10, 82 mm SL; AJRPC 10, 91 mm SL, FSJF 4113, 82 mm SL; Kangavar stream.

FIGURE 6 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 6. Glyptothorax vatandousti paratypes; from top: AJRPC 10, 83 mm SL; FSJF 4113, 82 mm SL, AJRPC 10, 82 mm SL; Kangavar stream.

FIGURE 5 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 5. Glyptothorax vatandousti paratypes; from top: AJRPC 10, 83 mm SL; FSJF 4113, 82 mm SL, AJRPC 10, 82 mm SL; Kangavar stream.

FIGURE 4 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 4. Glyptothorax vatandousti paratypes; from top: AJRPC 10, 83 mm SL; FSJF 4113, 82 mm SL, AJRPC 10, 82 mm SL; Kangavar stream.

FIGURE 2 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 2. Bayesian phylogenetic tree of Glyptothorax species from Iran based on the mitochondrial DNA barcode region. Numbers near nodes are Posterior probability/UFBoot/aLRT SH-Like values. The tree is drawn to scale (except to outgroup) with branch lengths depicting number of substitutions per site. ASAP, Assemble Species by Automatic Partitioning. ABGD, Automatic Barcode Gap Discovery. The list of sequences is presented in Table 1.

FIGURE 7 in Glyptothorax vatandousti, a new species of torrent catfish from the upper Karkheh drainage in Iran (Teleostei: Sisoridae)

FIGURE 7. Glyptothorax vatandousti, paratypes, from top: AJRPC 10, 82 mm SL; FSJF 4113, 82 mm SL, AJRPC 10, 91 mm SL; Kangavar stream.

FIGURE 4 in A new genus and species of whiptail armored catfish (Siluriformes: Loricariinae) from southern Venezuela

FIGURE 4. Map of Venezuela showing the geographic distribution of Cheilonimata minuta, red star type locality. Some symbols may represent more than one lot.

FIGURE 3. Cheilonimata minuta, ANSP 162156, 39.5 in A new genus and species of whiptail armored catfish (Siluriformes: Loricariinae) from southern Venezuela

FIGURE 3. Cheilonimata minuta, ANSP 162156, 39.5 mm SL, paratype, detail of buccal ornamentation on mouth roof and behind premaxillaries (red arrow). Scale bar 1 mm. Photo by F. Provenzano.

FIGURE 2 in A new genus and species of whiptail armored catfish (Siluriformes: Loricariinae) from southern Venezuela

FIGURE 2. Cheilonimata minuta, MBUCV-V-32954, 54.3 mm SL, holotype. a) Detail of ventral view to show: head contour, mouth and abdomen cover. b) Close-up of mouth, detail of lower lip cover and translucent membrane on upper lip margin (red arrows). Scale bar 2 mm. c) Photos by C. Do Nascimiento.

Fig. 14 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 14. Habitus of Cornechiniscus holmeni (LM): A – posterior body portion of adult female with appendage E intermediate between spine and cirrus; B – juvenile; C – larva. Scale bars in μm.

Fig. 10 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 10. Dorsal plate sculpturing and claws of Cornechiniscus mystacinus sp. nov. (SEM): A – anterior body portion; B – median body portion; C – posterior body portion; D – claws I and spine I; E claws II; F – claws IV. Scale bars in μm.

Fig. 9 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 9. Morphology of cephalic and trunk appendages of Cornechiniscus mystacinus sp. nov. (LM): A–C – cirrus A and (primary) clava; D – spine C; E lobe D; F – spines D–E. Arrowheads indicate aberrant additional processes developed on cirrophores. Scale bars in μm.

Fig. 6 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 6. Dorsal plate sculpturing of juveniles of Cornechiniscus mystacinus sp. nov. (LM): A – anterior body portion; B – median body portion; C – posterior body portion. Scale bars in μm.

Fig. 4 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 4. Habitus of Cornechiniscus mystacinus sp. nov. (LM): A – juvenile (paratype in dorsolateral view); B – ventral granulation of an adult female. Letters C–E signify lateral appendage positions, whereas ps – teeth on the posterior margin of the pseudosegmental plate IV'. Scale bars in μm.

Fig. 12 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 12. Habitus of adult female of Cornechiniscus holmeni (LM, lateral view). Letters C–E signify lateral appendage positions, whereas ps – teeth on the posterior margin of the pseudosegmental plate IV'. Scale bar in μm.

Fig. 2 in Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Fig. 2. Habitus of Cornechiniscus mystacinus sp. nov. (LM): A – adult female freshly mounted in Hoyer's medium (paratype in lateral view); B – cephalic body portion of another adult female just preserved on a permanent slide (paratype in dorsolateral view); C – adult female (holotype in dorsolateral view); D – adult male (allotype in dorsolateral view). Letters C–E signify lateral appendage positions. Scale bars in μm.