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113 results for “fish diet”
Data from “Larval and juvenile Longfin Smelt diets as a function of fish size and prey density in the San Francisco Estuary”
This publication includes the raw data from the manuscript: Lojkovic Burris, Z. P., R. D. Baxter, and C. E. Burdi. 2022. Larval and juvenile Longfin Smelt diets as a function of fish size and prey density in the San Francisco Estuary. California Fish and Wildlife Journal 108:e11. http://www.doi.org/10.51492/cfwj.108.11 Data includes the diets of larval and juvenile Longfin Smelt in the San Francisco Estuary from 2005 to 2008 in the form of diet by number, diet by weight, macroinvertebrate prey lengths, prey length-weight equations, and prey weight conversions.
Diet composition for small pelagic fishes across the Northeast U.S. Continental Shelf for NES-LTER, ongoing since 2013
These data represent the diet composition of small pelagic fishes assessed by the Northeast U.S. Shelf Long-Term Ecological Research (NES-LTER) project. The six species of fish in this dataset represent a subset of the species collected in bottom trawls conducted by the NOAA Fisheries Northeast Ecosystems Surveys from Cape Hatteras to the Gulf of Maine. Sampling occurred in the Spring and Fall seasons. Fish were frozen and stomach content analyses were conducted by the Fisheries Oceanography and Larval Fish Ecology Lab at the Woods Hole Oceanographic Institution. Data are counts and length measurements for prey items examined under a dissecting microscope. Prey species were matched to the lowest taxonomic level in the Integrated Taxonomic Information System (ITIS) for scientific name and taxonomic serial number. The dataset was supplemented with geospatial and temporal information from NOAA Fisheries trawl databases.
Stomach contents (1977-1981) and stable isotopes (1994) from the Everglades, Florida, USA from the publication "Fishes in a seasonally pulsed wetland show spatiotemporal shifts in diet and trophic niche but not shifts in trophic position"
Stomach contents of fishes (1977-1981) and stable isotopes of fishes, invertebrates, and basal resources (1994) were collected from spikerush marsh, sawgrass ridge, and alligator pond habitats in Shark River Slough, Everglades National Park, Florida, USA. These data were used to quantify diet, trophic niche area, trophic position, basal resource use and how these metrics vary among size classes, seasons, and habitats. Data collection is complete. These data support Flood et al. (2023). Associated R code will be made available through Peter Flood's GitHub: https://github.com/pjflood/historic_everglades_aquatic_food_web. References: Flood, Peter J., William F. Loftus, and Joel C. Trexler. "Fishes in a seasonally pulsed wetland show spatiotemporal shifts in diet and trophic niche but not shifts in trophic position." Food Webs 34 (2023): e00265. https://doi.org/10.1016/j.fooweb.2022.e00265
Adelie penguin diet composition, fish species and number, 1991-2024
The fundamental long-term objective of the seabird component of the Palmer LTER (PAL) has been to identify and understand the mechanistic processes that regulate the mean fitness (population growth rate) of regional penguin populations. Since the inception of PAL, Adélie penguin populations have effectively collapsed, gentoo penguin populations have increased dramatically and chinstrap penguin populations have remained relatively stable. These trends are spatially and temporally coherent with regional warming and decreasing sea ice duration. Adélie penguins are an ice-obligate polar species whose life history is intimately linked to the presence of sea ice, while chinstrap and gentoo penguins are ice-intolerant species whose life histories evolved in the sub-Antarctic, where sea ice is a less permanent feature of the marine ecosystem. The PAL study region includes five main islands on which Adélie penguin colonies have historically occurred, with each island containing a different number of spatially segregated sub-colonies. These colonies are censused to determine the total number of nests and chicks produced each year, and breeding success. Diet samples are acquired to understand diet composition (e.g., krill, fish) and krill length-frequencies. In general, krill constitute the most important component of the summer diets by mass of these three penguin species, but changes in PAL krill abundances have exhibited no long-term trends and thus far, have failed to explain the divergent patterns in penguin populations evident in our time series. Chick fledging masses are recorded as a cumulative measure of climate, weather, diet, and parental influences on chick health at the end of the breeding season. These data have provided valuable insights into the marine and terrestrial factors that influence Adélie penguin population fitness. No data were collected during the 2021-2022 season due to the Palmer Station pier rebuild.
Data from: Dynamics of diet-egg transfer of fatty acids in the teleost fish, red drum (Sciaenops ocellatus)
<p>Eggs of marine organisms are increasingly being recognized as important components of marine food webs. The degree to which egg fatty acid profiles reflect maternal diet fatty acid profiles, and therefore the value of fatty acids in eggs as trophic biomarkers, depends on the species' reproductive strategy and the extent of modification of ingested fatty acids. We measured the dynamics of transfer of recently ingested fatty acids to spawned eggs in a batch-spawning teleost, red drum (<em>Sciaenops ocellatus</em>). Results of 21 dietshift experiments, from which the fatty acid profiles of the diets and eggs were compared, showed that 15 of 27 fatty acids measured (one saturated, two monounsaturated and 12 polyunsaturated fatty acids) in eggs were correlated with their levels in the recent diet, and the rate of incorporation into eggs was proportional to the magnitude of the diet shift. Large shifts in diet might occur naturally during spawningmigrations or when prey communities vary over time. Results of this study indicate that fatty acids in red drum eggs can be useful for studying adult diet and exploring trophic linkages in marine systems.</p> <p>This article is part of the theme issue 'The next horizons for lipids as 'trophic biomarkers': evidence and significance of consumer modification of dietary fatty acids'.</p>
Fig. 1 in New Prey Fishes In Diet Of Black Sea Bottlenose Dolphins, Tursiops Truncatus (Mammalia, Cetacea)
Fig. 1. Localities of sampling the stomach contents of Black Sea bottlenose dolphins: I — Kalamita Gulf, II — Feodosiya Gulf, III — Kerch Strait; K — Yalta (by Kleinenberg, 1938) and visual observations of bottlenose dolphins hunting on mullet: 1(?) — Tendra Spit (the certain locality is not identified), 2 — Uret Cape, 3 — Okunevka, 4 — Sevastopol, 5 — Meganom Cape, 6 — Karadag Nature Reserve, 7 — Chauda Cape, 8 — Opuk Cape, 9 — Ak-Burun Cape.
Fig. 3 in Fish diet composition in permanent and semi-permanent pools in tropical wetlands of the Yucatan Peninsula
Fig. 3. Percentage composition of main items consumed by fish in Permanent (A) and Semi-permanent (B) pools in BPR during the dry (black bars) and rainy season (dash bars) of 2010. FR = fish remains, TI = terrestrial invertebrates, AI = aquatic insects, PR = plant remains, CR = crustaceans (mainly amphipods), AR = arachnid, AL = algae, GA = gastropod and DE = detritus.
Fig. 2 in Fish diet composition in permanent and semi-permanent pools in tropical wetlands of the Yucatan Peninsula
Fig. 2. Fish feeding spectrum of aquatic insects and terrestrial invertebrates (proportions of different orders in the diet of all stomachs analyzed) between Permanent (A) and Semi-permanent (B) pools in the PBR during 2010. Species codes: Aa = Astyanax aeneus, Cu = Cichlasoma urophthalmus, Tm = Thorichthys meeki, Gy = Gambusia yucatana, Pv = Poecilia velifera, Pm = P. mexicana, Bb = Belonesox belizanus, Ro = Rocio octofasciata, Cs = Cichlasoma urophthalmus, Ps = Petenia splendida, On = Oreochromis niloticus, Pm = Paraneetroplus melanurus, Gp = Garmanella pulchra.
Fig. 1 in Fish diet composition in permanent and semi-permanent pools in tropical wetlands of the Yucatan Peninsula
Fig. 1. Geographic location of studied pools, permanent and semi-permanent in PBR, Campeche, Mexico during 2010.
Fig. 3 in Diet and trophic structure of the fish fauna in a subtropical ecosystem: impoundment effects
Fig. 3. Proportion in number and biomass (CPUE) of the trophic guilds along the longitudinal gradient of the Salto Caxias Reservoir, Iguaçu River, before and after the impoundment. (1 = upstream; 2 = middle region; 3 = dam; 4 = downstream) (Alg = algivores; Det = detritivores; Her = herbivores; Ain = aquatic insectivores; Tin = terrestrial insectivores; Inv = invertivores; Omn = omnivores; Pis = piscivores; Pla = planktivores; Car = carcinophages).
Fig. 1 in Diet and trophic structure of the fish fauna in a subtropical ecosystem: impoundment effects
Fig. 1. Location of sampling sites along the longitudinal gradient of the Iguaçu River, in the area influenced by the Salto Caxias Reservoir, Paraná State. a) before the impoundment; b) after the impoundment. (site 1 = upstream; site 2 = middle region; site 3 = dam; site 4 = downstream).
Fig. 2 in Diet and trophic structure of the fish fauna in a subtropical ecosystem: impoundment effects
Fig. 2. Graphical representation of the first two axes of the Nonmetric multidimensional scaling (nNMDS), demonstrating the food resources used by the fish fauna in the different sites and phases, in the area influenced by the Salto Caxias Reservoir, Iguaçu River. FR = Food resources (AI = aquatic insects; TI = terrestrial insects; DE = decapods; MC = microcrustaceans; MA = macroinvertebrates; MI = microinvertebrates; FI = fish; FS = fish scales; AP = aquatic plants; TP = terrestrial plants; AL = algae; DS = detrit/sediment); B = before impoundment, A = after impoundment; 1 to 4 = sampling sites.
Fig. 3 in How does diet influence the reproductive seasonality of tropical freshwater fish? A case study of a characin in a tropical mountain river
Fig. 3. Non-Metric Multi-Dimensional Scaling Ordination (NMDS) of monthly variations of the diet with respect to sex. Stress = 0.10. Filled symbols are the dry months.
Fig. 2 in How does diet influence the reproductive seasonality of tropical freshwater fish? A case study of a characin in a tropical mountain river
Fig. 2. Monthly variation of prey types-IRI values. Rainfall follows a bimodal seasonal pattern (shadow on background). The asterisks show the months in which reproduction occurs.
Fig. 1 in How does diet influence the reproductive seasonality of tropical freshwater fish? A case study of a characin in a tropical mountain river
Fig. 1. Ontogenetic and intersexual variation in the diet of Creagrutus guanes. Size classes correspond to standard length ranges: 3 = 21-30 mm; 4 = 31-40 mm; 5 = 41-50 mm; 6 = 51-60 mm; 7 = 61-70mm; 8 = 71-80mm.
Fig. 2 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 2. Results from multivariate analysis nMDS (nonmetric multidimensional scaling) for fish collected in January and July 2010, downstream from Itutinga Dam, Grande River, in the four flow rate treatments (1 - constant flow rate in January; 2 - hydropeaking in January; 3 - constant flow rate in July; 4 - hydropeaking in July).
Fig. 1 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 1. Schematic drawing of the Grande River basin upstream from Furnas Reservoir. The study area is highlighted by a black circle.
Fig. 4 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 4. Relationship among the diet dissimilarity between seasons and diet dissimilarity stable and hydropeaking treatments in January (a) and July (b). Line is representing a linear correlation. Correlation values (r and p) are indicated. Aa= Apareiodon affinis; Aal= Astyanax altiparanae; Af= Astyanax fasciatus; Bs= Bryconamericus stramineus; Cn= Cyphocharax nagelii; Ev= Eigenmmania virescens; Hy1= Hypostomus sp.1; Hym= Hypostomus aff. margaritifer; Ihe= Iheringichthys labrosus; Km= Knodus moenkhausii; La= Leporinus amblyrhynchus; Lo= Leporinus octofasciatus; Pa= Piabina argentea; Pm= Pimelodus maculatus; Sn= Schizodon nasutus.
Fig. 3 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 3. Average frequency of occurrence of food items in the analyzed treatments based on SIMPER analysis, downstream from Itutinga Dam, Grande River. a - Assemblage level; b - Invertivores guild; c - Iliophagous guild; d - Generalists guild; e - Herbivores guild.
Fig. 3 in Diet shift of Red Belly Pacu Piaractus brachypomus (Cuvier, 1818) (Characiformes: Serrasalmidae), a Neotropical fish, in the Sepik-Ramu River Basin, Papua New Guinea
Fig. 3. Bray Curtis (Polar) ordination of arcsine-square root transformed volumetric proportions of food categories. Abbreviations: AP, aquatic plants; AI, aquatic invertebrates; Fi, fish remains; TP, terrestrial plants; TI, terrestrial invertebrates. Other includes: mammals, arthropods, plant material of unknown origin, and debris (Sepik); detritus (Tarapoto); gravel (Caquetá FW). Site abbreviations follow those in Fig. 2.
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