Obituaries - Rezneat Milton Darnell, Jr. (1924-2009) and Royal Dallas Sutkus (1920-2009)

Obituaries of Rezneat Milton Darnell, Jr. and Royal Dallas Suttkus

Stability and resiliency of fish assemblages in an Ozark stream /

Fish assemblages from main channel riffle habitats varied independently with little evidence of stability. Assemblages from backwater inlet and pool habitats varied seasonally with respect to stability and resiliency. Results were inconsistent across sites for inlet assemblages. In backwater pools, a consistent pattern of stable and resilient fish-assemblage structure was noted in summer and fall. The pattern corresponds with a predictable pattern of resource limitation, and suggests equilibrium structure based on occurrences of interspecific competition. However, the summer-fall period coincided with the period of post-larval recruitment. During this period pool assemblages were dominated by young-of-year of species that occurred across habitat types, suggesting that the pattern of stability and resiliency was dependent on ephemerally high abundances of fish recruits. Life history characteristics of the species considered here support an interpretation of the pattern as independent coexistences of species.Predictions of alternative hypotheses of assemblage structure concerning equilibrium states were tested for fish assemblages from spatially repeated sets of habitats in an Ozark stream. Equilibrium characteristics (stability and resiliency) were elucidated through manipulation experiments conducted within habitats over a 15-mo period and Mantel tests for associations among the correlation patterns of the fish assemblages within habitats across sites

Checklist of the Inland Fishes of Louisiana

Since the publication of Freshwater Fishes of Louisiana (Douglas, 1974) and a revised checklist (Douglas and Jordan, 2002), much has changed regarding knowledge of inland fishes in the state. An updated reference on Louisiana’s inland and coastal fishes is long overdue. Inland waters of Louisiana are home to at least 224 species (165 primarily freshwater, 28 primarily marine, and 31 euryhaline or diadromous) in 45 families. This checklist is based on a compilation of fish collections records in Louisiana from 19 data providers in the Fishnet2 network (www.fishnet2.net). The checklist has grown because of descriptions of three new species, new distribution records of both native and non-native species, and the addition numerous of marine species that are known to enter freshwaters in Louisiana

Toward a Flexible Metadata Pipeline for Fish Specimen Images

Flexible metadata pipelines are crucial for supporting the FAIR data principles. Despite this need, researchers seldom report their approaches for identifying metadata standards and protocols that support optimal flexibility. This paper reports on an initiative targeting the development of a flexible metadata pipeline for a collection containing over 300,000 digital fish specimen images, harvested from multiple data repositories and fish collections. The images and their associated metadata are being used for AI-related scientific research involving automated species identification, segmentation and trait extraction. The paper provides contextual background, followed by the presentation of a four-phased approach involving: 1. Assessment of the Problem, 2. Investigation of Solutions, 3. Implementation, and 4. Refinement. The work is part of the NSF Harnessing the Data Revolution, Biology Guided Neural Networks (NSF/HDR-BGNN) project and the HDR Imageomics Institute. An RDF graph prototype pipeline is presented, followed by a discussion of research implications and conclusion summarizing the results.Comment: 12 pages. 5 figures. Presented at the 16th International Conference on Metadata and Semantics Research. To be published in the conference proceedings of Metadata and Semantic Research: 16th International Conference, MTSR 2022, London, United Kingdom, November 8-10, 202

Occasional papers

no.4 (1994

Fishes of the Choctawhatchee River System in Southeastern Alabama and Northcentral Florida

The diversity and distribution of fish species occurring in the Choctawhatchee River drainage in southeastern Alabama and northcentral Florida were surveyed to obtain historical baseline information. Three hundred seventy-four sites were evaluated for species diversity and distribution in the drainage, including compilation of unpublished records from southeastern natural history museums. The greatest diversity at any single site was 37 species. Sixty-eight sites were represented by 15 species or more, and 26 sites were represented by a single species. The most frequently encountered species includes Gambusia holbrooki, Percina nigrofasciata, Esox americanus, Notropis texanus, Lepomis macrochirus, Cyprinella n. sp. cf venusta, Notropis amplamala, and Aphredoderus sayanus. New records for Hybopsis n. sp. cf winchelli and Etheostoma parvipinne were found in the drainage, and range extensions were found for 14 other species. Our study increases the known number of fish species in the Choctawhatchee River drainage to 132 species and two hybrids, including 83 native freshwater, 10 introduced freshwater, 24 estuarine, and 17 marine species