An adult, male, captive lined seahorse (Hippocampus erectus) was presented with weight loss, anorexia, and brood pouch distention. Initial treatments included manual expression of the brood pouch followed by saline flushes and enrofloxacin infusions. Radiographs and physical examination identified a nodular swelling in the brood pouch wall. The mass was excised, but the seahorse died. Necropsy and histopathology revealed a malignant mesenchymal tumor with a collagenous stroma, and a brood pouch fibrosarcoma was diagnosed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1638/02-085 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Reproductive toxicity and molecular mechanisms of benzo[a]pyrene exposure on ovary, testis, and brood pouch of sex-role-reversed seahorses (Hippocampus erectus).
Environ Pollut
December 2024
School of Fisheries, Ludong University, Yantai, 264025, China; Research and Development Center of Science, Technology and Industrialization of Seahorses, Ludong University, Yantai, 264025, China. Electronic address:
As a flagship taxa for marine ecosystems, seahorses possess a unique reproductive strategy of "male pregnancy". They are severely threatened by marine petroleum-based pollution but the molecular mechanism involved remains unclear. We evaluated the toxic effects and mechanisms of sub-acute exposure to benzo[a]pyrene (BaP), a representative polycyclic aromatic hydrocarbon (PAH), at three environmental related dosages (0.
View Article and Find Full Text PDFThe Curious Case of Eulimnogammarus cyaneus (Dybowsky, 1874): Reproductive Biology of a Widespread Endemic Littoral Amphipod From Lake Baikal.
J Exp Zool A Ecol Integr Physiol
December 2024
Irkutsk State University, Irkutsk, Russia.
Comparative studies of reproductive biology and formation of reproductive isolation need appropriate model systems, such as groups of related species. The amphipods (Crustacea: Amphipoda) of ancient Lake Baikal are an attractive group for such works, as they consist of several hundred species that radiated within the lake and have very different levels of intraspecific genetic diversity and reproduction timing. We have previously shown that one of the most widely distributed and best studied littoral species, Eulimnogammarus verrucosus (Gersfeldt, 1858), comprises cryptic species exhibiting a post-zygotic reproductive barrier.
View Article and Find Full Text PDFAndrogens and androgen receptor directly induce the thickening, folding, and vascularization of the seahorse abdominal dermal layer into a placenta-like structure responsible for male pregnancy via multiple signaling pathways.
Int J Biol Macromol
November 2024
Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture (CAS), Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, China; Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China. Electronic address:
Seahorses exhibit the unique characteristic of male pregnancy, which incubates numerous embryos in a brood pouch that plays an essential role in enhancing offspring survivability. The pot-belly seahorse (Hippocampus abdominalis) possesses the largest body size among seahorses and is a significant species in Chinese aquaculture. In this study, we revealed the cytological and morphological characteristics, as well as regulatory mechanisms, throughout the entire brood pouch development in H.
View Article and Find Full Text PDFThe evolution of exceptional diversity in parental care and fertilization modes in ray-finned fishes.
Evolution
October 2024
HUN-REN-UD Evolution of Reproductive Strategies Research Group, Department of Evolutionary Zoology and Human Biology, University of Debrecen, H-4032 Debrecen, Hungary.
Among vertebrates, ray-finned fishes (Actinopterygii) display the highest diversity in parental care, and their diversification has been hypothesized to be related to phylogenetic changes in fertilization modes. Using the most comprehensive, sex-specific data from 7,600 species of 62 extant orders of ray-finned fishes, we inferred ancestral states and transitions among care types and caring episodes (i.e.
View Article and Find Full Text PDFPaternal protein provisioning to embryos during male seahorse pregnancy.
Reproduction
April 2024
The University of Sydney, School of Life and Environmental Sciences, Sydney, NSW, Australia.
In Brief: Seahorses exhibit male pregnancy and are thus valuable comparative models for the study of the physiology and evolution of pregnancy. This study shows that protein is transported from fathers to developing embryos during gestation, and provides new knowledge about paternal contributions to embryonic development.
Abstract: Syngnathid embryos (seahorses, pipefishes and seadragons) develop on or in the male in a specialised brooding structure (brood pouch).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!