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12 results for “Fishing practices”
Dataset - Drying out fish ponds, for an entire growth season, as an agroecological practice: maintaining primary producers for fish production and biodiversity conservation
<p>This dataset is based on samples taken from fish ponds in the Dombes region between 2007 and 2014. It includes sediment and water physio-chemistry data, as well as primary producer diversity, benthic invertebrate density and fish yield for 85 different ponds. All these data are linked to the distance to the last dry-out, a major practice in extensive fish farming in this region.</p> <p>There are two .tab and .csv files:<br> One containing the dataset<br> One containing the description of the different variables (Metadata)</p>
"The sound comes from a meadow in the Sierra Nevada Mountains in California. The meadow is at an elevation of 2400 meters near a mountain named Olancha Peak, which is 3700 meters in altitude. Ihave a group of friends with which Ibackpack (trek) into the mountains. Our goal was to spend some time in the mountains and hike to the top of Olancha Peak (…) By the time we reached the meadow, we were in a forest and there was still snow on the ground in some places. We took the trip in June of 2006. The Sierra Nevada Mountains are a large mountain range. Much of the range is protected by national parks or preserved areas we call 'wilderness areas' (…) Ihave been backpacking for nearly 40 years and Iwill hopefully continue with this challenging activity for 40 years more! Many of my friends are much younger than Iam and it gives me much satisfaction to be able to have as much or more stamina for this activity than they have! When we are on these trips, we hike up peaks, catch fish, drink some whiskey around campfires and enjoy our time in the beautiful solitude. My memories of this trip were of the steep, hot hike from the desert to the cool meadow; the overall beauty of the nature, the absolute solitude of our campsite near the meadow; the strenuous hike to the top of Olancha Peak; the camaraderie of my friends; and, of course the sound of the frogs in the meadow. The frog sounds were astounding to me and Iwould listen in awe of the creature's instinctual desire to reproduce and continue the existence of their kind. Surely there were different species in the meadow for some of the frog sounds were different than others. The sounds only occurred after the Sun went down for the evening. Istood next to the creek in the meadow and recorded the sounds using my digital camera." [Peter/plentz1960]16 in Collecting Sounds. Online Sharing of Field Recordings as Cultural Practice
"The sound comes from a meadow in the Sierra Nevada Mountains in California. The meadow is at an elevation of 2400 meters near a mountain named Olancha Peak, which is 3700 meters in altitude. Ihave a group of friends with which Ibackpack (trek) into the mountains. Our goal was to spend some time in the mountains and hike to the top of Olancha Peak (…) By the time we reached the meadow, we were in a forest and there was still snow on the ground in some places. We took the trip in June of 2006. The Sierra Nevada Mountains are a large mountain range. Much of the range is protected by national parks or preserved areas we call 'wilderness areas' (…) Ihave been backpacking for nearly 40 years and Iwill hopefully continue with this challenging activity for 40 years more! Many of my friends are much younger than Iam and it gives me much satisfaction to be able to have as much or more stamina for this activity than they have! When we are on these trips, we hike up peaks, catch fish, drink some whiskey around campfires and enjoy our time in the beautiful solitude. My memories of this trip were of the steep, hot hike from the desert to the cool meadow; the overall beauty of the nature, the absolute solitude of our campsite near the meadow; the strenuous hike to the top of Olancha Peak; the camaraderie of my friends; and, of course the sound of the frogs in the meadow. The frog sounds were astounding to me and Iwould listen in awe of the creature's instinctual desire to reproduce and continue the existence of their kind. Surely there were different species in the meadow for some of the frog sounds were different than others. The sounds only occurred after the Sun went down for the evening. Istood next to the creek in the meadow and recorded the sounds using my digital camera." [Peter/plentz1960]16
Data from: Tropical ancient DNA from bulk archaeological fish bone reveals the subsistence practices of a historic coastal community in southwest Madagascar
Taxonomic identification of archaeological fish bones provides important insights into the subsistence practices of ancient coastal peoples. However, it can be difficult to execute robust morphological identification of fish bones from species-rich fossil assemblages, especially from post-cranial material with few distinguishing features. Fragmentation, weathering and burning further impede taxonomic identification, resulting in large numbers of unidentifiable bones from archaeological sites. This limitation can be somewhat mitigated by taking an ancient DNA (aDNA) bulk-bone metabarcoding (BBM) approach to faunal identification, where DNA from non-diagnostic bone fragments is extracted and sequenced in parallel. However, a large proportion of fishing communities (both past and present) live in tropical regions that have sub-optimal conditions for long-term aDNA preservation. To date, the BBM method has never been applied to fish bones before, or to fossils excavated from an exposed context within a tropical climate. Here, we demonstrate that morphologically indistinct bulk fish bone from the tropics can be identified by sequencing aDNA extracted from 100 to 300 ya archaeological midden material in southwest Madagascar. Despite the biases of the approach, we rapidly obtained family, genus, and species-level assemblage information, and used this to describe a subset of the ichthyofauna exploited by an 18th century fishing community. We identified 23 families of fish, including benthic, pelagic, and coral-dwelling fishes, suggesting a reliance on a variety of marine and brackish habitats. When possible, BBM should be used alongside osteological approaches to address the limitations of both; however, this study highlights how genetic methods can nevertheless be a valuable tool for helping resolve faunal assemblages when morphological identification is hindered by taphonomic processes, lack of adequate comparative collections, and time constraints, and can provide a temporal perspective on fish biodiversity in the context of accelerated exploitation of the marine environment.
FIGURE 5 in Diversity of Cichlid Fishes (Cichliformes: Cichlidae) in Chiapas, Mexico: A practical identification key with updated distribution maps
FIGURE 5. Geographic distribution of species cichlids of Chiapas (continuation). The symbols indicate the locations of distribution within Chiapas.
FIGURE 4 in Diversity of Cichlid Fishes (Cichliformes: Cichlidae) in Chiapas, Mexico: A practical identification key with updated distribution maps
FIGURE 4. Geographic distribution of species cichlids of Chiapas. The symbols indicate the locations of distribution within Chiapas.
FIGURE 1 in Diversity of Cichlid Fishes (Cichliformes: Cichlidae) in Chiapas, Mexico: A practical identification key with updated distribution maps
FIGURE 1. Main largest basins in Chiapas and main bodies of water in the state (represented with the symbol ♦) and neighboring regions (represented with the symbol ♦). I (Chixoy River), II (Lacantún River), III (Montebello Lagoons), IV (Tzendales River), V (Lacanjá River), VI (Usumacinta River), VII (Catazajá Lagoons), VIII (Tulijá River), IX (Pichucalco River), X (Mezcalapa River), XI (Grande River), XII (La Venta River), XIII (Santo Domingo River), XIV (Zanatenco River), XV (Margaritas River), XVI (Chantuto-Panzacola estuarine lagoon system), and XVII (Suchiate River), XVIII (Coatzacoalcos River), XIX (Tonalá River), XX (Ostuta River), XXI (Candelaria River), XXII (Champotón River), XXIII (Izabal Lake), XXIV (Polochic River) and XXV (Motagua River).
FIGURE 3 in Diversity of Cichlid Fishes (Cichliformes: Cichlidae) in Chiapas, Mexico: A practical identification key with updated distribution maps
FIGURE 3. Cichlids that are distributed in Chiapas (continuation). *Non-native species. A. Tthorichthys helleri. B. T. meeki. C. T. pasionis. D. T. salvini. E. Vieja bifasciata. F. V. breidohri. G. V. guttulata. H. V. hartwegi. I. V. melanurus. J. V. zonata. K. Wajpamheros nourissati. *L. Coptodon zillii. *M. Oreochromis aureus. *N. O. mossambicus. *O. O. niloticus. *P. Parachromis managuensis. Photograph of T. socolofi is not included, (there is a photo of specimen in life published in Ceballos et al. (2016)).
FIGURE 2 in Diversity of Cichlid Fishes (Cichliformes: Cichlidae) in Chiapas, Mexico: A practical identification key with updated distribution maps
FIGURE 2. Cichlids that are distributed in Chiapas. A. Amphilophus trimaculatus. B. Astatheros macracanthus. C. Chiapaheros grammodes. D. Cincelichthys pearsei. E. Chuco intermedium. F. Cribroheros robertsoni. G. Kihnichthys ufermanni. H. Maskaheros argenteus. I. M. regani. J. Mayaheros urophthalmus. K. Oscura heterospila. L. Parachromis multifasciatus. M. Paraneetroplus gibbiceps. N. Petenia splendida. O. Rheoheros coeruleus. P. R. lentiginosus. Q. Rocio octofasciata. R. Theraps irregularis. Photograph of R. ocotal is not included (there is a photo of the fixed specimen in the original description proposed by Schmitter-Soto (2007a)).
Aurantiochytrium sp. and Nannochloropsis spp. meals as substitutes for fish oil in practical diets for Pacific white shrimp.
<p>This study evaluated the use of microalgae (<em>Aurantiochytrium</em> sp. and <em>Nannochloropsis</em>) meals as substitutes for fish oil in the diet of Pacific white shrimp (<em>Litopenaeus vannamei</em>) reared in a clear water system. Dietary treatments tested five replacement levels (0%, 25%, 50%, 75%, 100%) in triplicate. Performance parameters and fatty acid composition of the animals' muscle were analyzed. After 49 days, the final weight obtained was, on average, 16.59 g, and the animals' growth was around 1.89 g/week. Feed conversion was, on average, 1.47, and survival was above 97%. Fatty acid composition remained balanced, regardless of the replacement levels, as well as their amount within groups, such as n-6 and n-3. Thus, in view of the results obtained, it is clear that the formulation of a high-performance diet without any ingredients of marine origin (fish oil or fish meal) and that contributes to the sustainability of aquaculture, is indeed possible.</p>
Data from: Herbivorous fish rise as a destructive fishing practice falls in an Indonesian marine national park
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Data from: Tropical ancient DNA from bulk archaeological fish bone reveals the subsistence practices of a historic coastal community in southwest Madagascar
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GOOD FISH QUARANTINE PRACTICE FOR FINFISH BIOSECURITY, WELL-BEING, AND DISEASE-FREE STATUS BEFORE RECEIVING AND SHIPPING JUVENILE (EPENIPHELUS SPP)
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