Faculty/Research Works

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https://hdl.handle.net/20.500.11801/4
Items included in this collection represent the diverse products generated by the academic and creative labor of UPRM's faculty members. These may include textual documents (research articles, books, book chapters, technical reports, etc.), conference presentations outside of UPRM, research posters, and other products such as maps, graphics, or computer code. To learn more about what works can be submitted to this collection, visit https://libguides.uprm.edu/repositorioUPRM/facultad

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Now showing 1 - 5 of 291
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    Efecto del transplant experimental de la ostra Crassostrea virginica, a un medio marino sobre la gametogenesis, supervivencia y crecimiento
    (Centro de Publicaciones Académicas, Facultad de Artes y Ciencias, Universidad de Puerto Rico en Mayagüez, 1988) Vélez R., Aníbal ; Díaz, Domingo ; Universidad de Oriente, Cumana, Venezuela ; Universidad Francisco de Miranda, Venezuela ; Instituto Oceanográfico ; Centro de Investigaciones Marinas
    In this paper we have studied the effects of the Gulf of Cariaco (eastern Venezuela) marine environment on individuals of the American oyster (Crassostrea virginica) transplanted from natural populations present in the estuarine waters of the tributaries of the Gulf of Paria (eastern Venezuela). These Specimens were previously acclimated to full strength seawater by gradual salinity increments. The low rates of growth, survival and gametogenesis observed in the experimental groups showed that it would be extremely difficult to transplant Crassostrea virginica juveniles from their natural brackish water environment to a marine environment.
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    A stranded sperm whale, Physeter catodon, at Cayo Santiago, Puerto Rico
    (Centro de Publicaciones Académicas, Facultad de Artes y Ciencias, Universidad de Puerto Rico en Mayagüez, 1988) Mignucci Giannoni, Antonio A. ; San Juan, Puerto Rico
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    Feeding behavior in Aiptasia tagetes (Duchassaing and Michelotti) planulae: A plausible mechanism for zooxanthellae infection of aposymbiotic planktotrophic planulae
    (Centro de Publicaciones Académicas, Facultad de Artes y Ciencias, Universidad de Puerto Rico en Mayagüez, 1988) Riggs, Linda L. ; University of Puerto Rico at Mayagüez ; Department of Marine Sciences
    The common West Indian sea anemone, Aiptasia tagetes (Duchassaing and Michelotti), is a natural host for the symbiotic dinoflagellate, Symbiodinium sp., in which direct transmission of zooxanthellae from the host to the eggs does not occur. Under normal ambient conditions A. tagetes was found to be dioecious and oviparous. Feeding experiments on the ovoid ciliated planulae of A. tagetes were conducted. Planulae readily ingested Uca sp. claw meat, Artemia sp. flakes and zooxanthellae. Zooxanthellae originating from egested balls of zooxanthellae from the host, from freshly isolated cells of the host, as well as those naturally occurring in the seawater system were all accumulated by the planulae. Planulae were maintained for a maximum of 35 days (longest to survive) in culture and zooxanthellae were retained by the planulae for the entire period. It is unknown whether the planulae became infected by the zooxanthellae.
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    Population dynamics of the butterfly Heliconius charitonius L. in Puerto Rico
    (Centro de Publicaciones Académicas, Facultad de Artes y Ciencias, Universidad de Puerto Rico en Mayagüez, 1988) Quintero, Hector E. ; Inter American University, San German, Puerto Rico ; Department of Biology
    A multiple mark and recapture study of a Heliconius charitonius L. population in Puerto Rico was completed over a 42 week period during which 682 butterflies were marked. Population size estimates fluctuated from a low of 135 in December to 351 in October with a mean of 240. No correlation was found between population size and precipitation. Adults did not move great distances and thus resembled other helicoids that have limited home ranges. Movements within the forest were associated with adult food availability. The estimated adult maximum life span was 90 days while the mean was 26 days; males and females did not differ significantly. Sex ratio was 1.5:1, the opposite results from Costa Rica. Roosting and morphological variations were also considered.
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    Revisión de la familia Actaletidae Borner, 1902 (Insects: Collemnola)
    (Centro de Publicaciones Académicas, Facultad de Artes y Ciencias, Universidad de Puerto Rico en Mayagüez, 1988) Soto-Adames, Felipe N. ; University of Puerto Rico at Mayagüez ; Department of Biology
    A taxonomic revision of the family Actaletidae is presented with a complementary study of its general morphology. As a result, the new genus, Spinactaletes is proposed for the New World species. Four new species from Puerto Rico are described within the new genus: S. calcalectoris, S. myoptesimus, S. bellingeri and S. aebianus. In addition, a key to the genera and species in the family Actaletidae is provided. Spinactaletes is distinguished from Actaletes by having a conspicuous sexual dimorphism, presence of tricobothrium C on the fourth abdominal segment, presence of dental spines, length of the tergal sutures on the fourth abdominal segment, extension of tracheal system, shape of the reproductive system complex in adult males, morphology of maxillae, shape of sublobular plate and distance between mucronal teeth. The main diagnostic characters in Spinactaletes are the morphology of the metatibiotarsal spur and chaetotaxy of the second, third and fourth antennal segments of adult males. Other diagnostic characters are found in the mouth parts and shape of the unguiculus.