Capturing Brycon Henni Individuals

The size and shape of the pelvis gives clues to how an animal may reproduce.

Between 1999 and 2004, researchers collected tissue samples from the “fins, muscles, or liver” of scalloped hammerheads. The samples were obtained via fishing or fish markets across multiple ocean basins, including “Pacific: Baja California, Pacific Panama, Hawaii, the Philippines, Taiwan, and eastern Australia; Indian: Thailand, western Australia, Seychelles, and South Africa; Atlantic: Western Africa, Brazil, Atlantic Panama, Gulf of Mexico, and east Coast USA” (K.M. Duncan et al. 2240). It is important to note that the researchers also retrieved samples from juvenile scalloped hammerheads that dwelled in separate feeding areas from the adults where, and this is because there was likely to be overlap between breeding populations within the

Remove the dorsal portion of the carapace to observe other organs in the head and thorax.

Certain types of large snakes, in particular boas and pythons, and cetaceans, whales and dolphins, are shown to have homologous hip bones, a pelvis and femur. These bones have previously been considered vestigial--organ or body part which became redundant through the course of evolution--, but upon further research, have shown to serve a purpose.

The aim of this report is to present the investigation about the large numbers of dead perch were found in the river in the city area and giving recommendation to avoid this happening in the future.

According to Ming's study, which was a complete study of the life history of grass pickerel in Oklahoma, females weighed more and grew to longer lengths than males did over the 4 years this study was conducted. Specifically, females were averaged to weigh 127g, 197g, 248g, and 306g in the 1st, 2nd, 3rd, and 4th years of the study respectively, whereas males were averaged to weigh 123g, 195g, and 235g in the same time period. Although there is no data for male weights in the 4th year, we can follow the data trends and assume they are smaller than the females as well. The total lengths of male and female grass pickerel follow the same trend; Females in age group III (meaning they are 3 years old, determined by scale method, measuring the rings on the scales on the body) had average lengths of 140mm, 203mm, and 245mm through years 1-3 respectively. Similar to the weight trend, males tended to be smaller than the females through the same time period, with average lengths of 132mm, 194mm, 235mm (Ming,

Yet, this and others, are still some of most commonly used sites for sexing. Keen (1950) expressed that because morphology is often related to size and robustness, determining sex is extremely difficult unless extreme features are expressed, such as a very small mastoid process that projects only a small distance for females and a massive mastoid process that projects a great distance from the inferior margins of the skull for males. Furthermore Meindl et al. (1985) and Walker (1995) have discussed that the morphology of sites on the skull of both sexes appear more masculine as the person ages, which would also hinder the accuracy of determining the sex of skeletal remains. Buikstra and Ubelaker (1994, p.16) also caution that "estimation of sex can be difficult if the observer is not familiar with the overall pattern of variability within the population from which the sample" they are evaluating is drawn and so as a consequence can reduce accuracy in determining sex.

The research for this article was conducted by the University of California. The article focuses on how Atlantic Killfish found on the East Coast are very resilient and have adapted to extremely high levels

While some inherited traits do not have significant effects on phenotypes, PPSH has a severe impact on physical appearance. The most significant effect on phenotype is the indistinguishable male genitalia. There have been three distinct phenotypic possibilities seen with PPSH in terms of sexual development. Some are born with ambiguous genitalia, which is difficult to determine the gender. Others have what appears to be male genitalia in the form of a micropenis while their urethra is on the other side of the penis. However, the most common phenotype in PPSH males is genitalia that appears female.

The authors in paper one studied the genetic etiology of patients with disorders of sex development (DSD) (Kim et al, 2017). DSDs make up a congenital condition where the development of gonadal, chromosomal and anatomical sex is atypical (Kim et al, 2017). They

Cranio [Forensic] facial reconstruction [CFR] from the skeleton is a very crucial task in several research areas, especially in forensic anthropology, paleontology and archeology [1, 8, 10, and 11]. It is also known as “Forensic Facial Approximation” which is based on both scientific standards and artistic skill to rebuild s face on to a skull for recreation of antemorterm appearance of the individual in order to identify and recognize the decedent. This method can be classified among several reconstructive methods which attempt to reproduce the face from the cranial skeleton by approximating its volume and shape. It is most often used as many researchers all other techniques are fail to produce a person accurately. Cranio facial reconstruction

The virtual and actual dissections were education. The amphibians and mammalians were compared and contrasted on internal and external anatomy, evolutionary descent, and population trends and ecological issues. A lot was learned going through the packets and performing the dissections. The inference was made that the frog and rat have a common ancestor, but the frog stuck to that water and the rat went to

Spermatozoa is a system structural motile cells where its formation requires conditions both internally and externally in order to form spermatozoa were able to penetrate the egg perfectly. The purpose of this lab is to determine the shape and structure of some animal sperm. Knowing the normal levels or the presence of sperm and sperm concentration in a single millimeter. The method used is direct observation using a microscope preparation. In human sperm look normal sperm head shape is oval and slightly flattened. Tests on cattle have larger heads than human sperm and more oval. Moving more active than human sperm. Sperm locusts have no means of motion, only a round without any accessory

There was a positive correlation, which was not statistically significant between the female head length (mm) and the female rear limb length (mm), (r= 0.233, n= 14, p= 0.423). (Fig.2)

The average water quality in the containers holding the yolk sac larvae was a water temperature from 24.5 ⁰C to 25.5 ⁰C, pH from 6.9 to 7.3, DO from 6.9 to 7.7 mg/L, and total ammonia nitrogen (TAN) near 0 mg/L. The average of water quality parameters for swim-up fry of catfish in all concentrations of salinity are presented in Table 1. All parameters such as DO, pH, and TAN were within the acceptable limit for culturing fishes.