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Fig. 6 in New species of miniature fish from Marajó Island, Pará, Brazil, with comments on its relationships (Characiformes: Characidae)

Fig. 6. Bony hooks on pelvic fin of a male of Tyttobrycon marajoara, paratype, MZUSP 106110, 18.9 mm SL. Ventral view, left side.

Fig. 7 in New species of miniature fish from Marajó Island, Pará, Brazil, with comments on its relationships (Characiformes: Characidae)

Fig. 7. First anal-fin rays of a male of Tyttobrycon marajoara, paratype, MZUSP 106110, 18.9 mm SL, with bony hooks. Lateral view, left side.

Fig. 1 in New species of miniature fish from Marajó Island, Pará, Brazil, with comments on its relationships (Characiformes: Characidae)

Fig. 1. Tyttobrycon marajoara: (a) Holotype, MZUSP 109196, 17.9 mm SL, mature male, igarapé Olho d'água, Vila União, Salvaterra, Pará, Brazil; (b) Paratype, MZUSP 108820, 20.9 mm SL, mature female, collected with holotype.

Fig. 2 in New species of miniature fish from Marajó Island, Pará, Brazil, with comments on its relationships (Characiformes: Characidae)

Fig. 2. Tyttobrycon marajoara alive. Female above, male below, collected with paratypes in a small stream (igarapé) at balneário Olho no Olho, Marajó Island, Pará State, Brazil. Not preserved.

Fig. 3 in New species of miniature fish from Marajó Island, Pará, Brazil, with comments on its relationships (Characiformes: Characidae)

Fig. 3. Jaws of Tyttobrycon marajoara, paratype, MZUSP 106110, 20.5 mm SL. Scale bar = 1 mm, left side.

Fig. 1 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 1. Mean (± S.E.M) bimonthly variations of the gonadosomatic index in Metynnis maculatus females (n = 36). The different letters indicate significant differences among months. (ANOVA, Tukey test, P <0.05).

Fig. 5 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 5. (a) Pearson correlation between the volume density of final vitellogenic oocytes and the gonadosomatic index (GSI) (%) during the reproductive cycle of Metynnis maculatus females (n = 36). (b) Pearson correlation between the volume density of post-ovulatory follicles and the GSI (%) (n = 36). (c) Pearson correlation between the E 2 plasma levels and the GSI (%) (n = 20). (d) Pearson correlation between the 17α-OHP plasma levels and the GSI (%) (n = 20). (e) Pearson correlation between the E 2 plasma levels and the volume density of final vitellogenic oocytes (n = 20). (f) Pearson correlation between the 17α-OHP plasma levels and the volume density of the post-ovulatory follicles (n = 20). The continuous line indicates that the difference is statistically significant (Pearson's test, P <0.05).

Fig. 4 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 4. (a) Mean (± S.E.M) bimonthly plasma concentrations of E 2 in Metynnis maculatus females (n = 20). Different letters indicate significant differences among months (ANOVA, Tukey test, P <0.05). (b) Mean (± S.E.M) bimonthly plasma 17α – OHP concentrations (n = 20). Different letters indicate significant differences among months. (ANOVA, Tukey test, P <0.05).

Fig. 3 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 3. Mean percentages (± S.E.M) of different oocyte types from Metynnis maculatus females during the ovarian maturation cycle. Different letters indicate significant differences among the same type of oocytes among months (ANOVA, Tukey test, P <0.05).

Fig. 2 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 2. Photomicrographs of different oocyte types observed during the Metynnis maculatus reproductive cycle. (a) Previtellogenic oocytes showing multiple nucleolus (arrow), (b) Cortical alveoli oocyte; (c) Early vitellogenic oocyte with cytoplasm filled mostly with cortical alveoli (asterisk); (d) Final vitellogenic oocyte with cytoplasm completely filled with protein yolk granules (asterisk); (e) Post ovulatory follicles with numerous border folding (arrow), (f) Atretic oocytes with fragmented vitelline membrane (arrow) and a change in the appearance of the cytoplasm (asterisk). Hematoxylin-floxin. Scale bar = 100 µM..

Fig. 7 in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii

Fig. 7. Dynamics of relative predation (% from existed number of live whitebaits) for all model populations of B. bombina.

Fig. 1 in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii

Fig. 1. Overlapping areas of B. bombina and P. glenii distribution in Latvia (Pupina et al. In press).

Fig. 9 in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii

Fig. 9. Scheme of the reciprocal predation between B. bombina and its invasive threat P. glenii registered in the study.

Fig. 5 in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii

Fig. 5. Number of left live, predated, and died/ killed P. glenii in all experimental groups in total after the experiment.

Fig. 3 in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii

Fig. 3. Dynamics of number of live, predated, and died/killed P. glenii in different B. bombina model populations (Bb-1, Bb-2, Bb-3, and Bb-4).

opencc-by-4.0Dec 2019View details →

Рис. 3. Схема миграций виΑов рыб, участвующих в современной Αинамике ихтиофауны на территории НТТ: 1 — разΛивы; 2 — намывы. Черным цветом обозначены направΛения миграций из реки Туманной; красным — из оз. Хасан и РазΛивов; синим — с мест зимовки в реках южного Приморья; зеΛеным — сезонные миграции из южных морей Fig. 3. Scheme of migration of fish species involved in the modern dynamics of ichthyofauna on the territory of LRT: 1 — spills; 2 — alluvial. Black color indicates the direction of migration from the Tumannaya river; red — from lake Khasan and spills; blue — from wintering places in the rivers of southern Primorye; green — seasonal migration from the south seas in Transboundary Migration And The Local Constraints In The Dynamic Of Fish Fauna In The Lower Reaches Of Tumannaya River

Рис. 3. Схема миграций виΑов рыб, участвующих в современной Αинамике ихтиофауны на территории НТТ: 1 — разΛивы; 2 — намывы. Черным цветом обозначены направΛения миграций из реки Туманной; красным — из оз. Хасан и РазΛивов; синим — с мест зимовки в реках южного Приморья; зеΛеным — сезонные миграции из южных морей Fig. 3. Scheme of migration of fish species involved in the modern dynamics of ichthyofauna on the territory of LRT: 1 — spills; 2 — alluvial. Black color indicates the direction of migration from the Tumannaya river; red — from lake Khasan and spills; blue — from wintering places in the rivers of southern Primorye; green — seasonal migration from the south seas

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The wash zone and habitat use among three benthic fish species in stratified lakes

Mixing processes in lakes are important in determining sedimentation zones and in setting the so-called "wash zone", the area of lake bottom in contact with an oscillating thermocline during wind driven internal seiche events. The wash zone also aligns with a sharp change in sediment roughness and hardness. Taken together these rapid changes in temperature and sediment indicate that the wash zone is a distinctive ecotone in stratified lakes. Depth stratified randomized netting was used to develop count-based habitat use models for three common benthic fish species as a function of depth or temperature covariates. Using data from two lakes with quite different wash zone depths, we show the wash zone to describe fish habitat for two of three benthic fish species by utilizing the top 50% of estimated fish abundance as an indicator of habitat use. White sucker (Catostomus commersoni) habitat use was fully within the boundaries of the wash zone. Lake whitefish (Coregonus clupeaformis) habitat was adjacent and within the wash zone. Longnose sucker (C. catostomus) habitat use was in the deep areas of lakes dominated by sediment focusing and did not overlap white sucker. Lake whitefish habitat use overlapped both catostomids, but peak abundance of both lake whitefish and white sucker overlapped pointing to potential interactions between these species. Smaller lakes have less vigorous mixing processes and a narrower wash zone, so with a decline in lake size the likely area of the wash zone as habitat for benthic feeding fish would become smaller.

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opencc-by-4.0Feb 2010View details →

Fig. 2 in Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina

Fig. 2. Relationship between diversity and species richness in fish assemblages and the NO3:NH 4 ratio.

opencc-by-4.0Feb 2010View details →

Fig. 3 in Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina

Fig. 3. Bar chart showing the distribution of total fish collected of each species within the upper Salado River lakes. Species codes as listed in Table 2. Species are intentionally sorted by means of their spatial distribution to ease the interpretation. From left to right, from clear to dark filled bars: Mch = Mar Chiquita, Go = Gómez, Crp = Carpincho, and Rch = Rocha.