Sea creatures need oxygen, as do fish and humans

Sea creatures need oxygen, as do fish and humans

Wrath made wool. Information: Nicola Smith

Unseen ocean currents are the oldest multicellular animals on Earth and have polluted the ocean for nearly 900 million years, before the first plants appeared on land. Recent research is reported in the journal Fishing bulletinpublished by the National Oceanic and Atmospheric Administration, showing their growth is due to their oxygen supply in the same way as hardy animals such as fish.

Researchers from the University of British Columbia and Florida International University explained that a “dimensional tension” plays a role in the growth of sponges because they are required to rely on two parts of their inhalant pores. to supply their tridimensional growing body with oxygen. melted in water.

Analyzing data from recent and previous studies on sponges, and comparing their growth, the researchers said that such sponges are recorded at the center of the sponges. spherical sponges, such as those collected commercially, limit the size. In addition to this size, the sponges change from a nearly circular shape to a vase type. The central, impoverished part of the membranes near the circle is rich in anaerobic microbes – those that do not require molecular oxygen to survive.

“This is how sponges grow in a way that allows them to feed complex microbial communities within themselves to meet the geometric demands placed on their physiology,” says Dr. . Daniel Pauly, lead author of the study and lead researcher of the Sea Around Us project at UBC’s Institute for the Oceans and Fisheries.

“These microbial communities are similar to the human microbiome and can be as much as 40% of the body weight of a sponge,” Pauly said.

The UBC researcher is behind the Gill Oxygen Limitation Theory, which explains the links between growth and respiration in fish and other aquatic animals.

“Sponges were introduced over 800 million years ago in the Pre-Cambrian. At that time, the oxygen level in the air was only about 50% of what they are today. Although they have increased The earth’s oxygen stores were later replaced by the growth of multicellular plants, for 500 million years. ”When the earth depauperates oxygen. In the absence of specific tissues or organs to obtain oxygen, sponge morphology is severely restricted by physiological oxygen demand, “said Dr. Mark Butler, of Florida International University. , lead author of the study.

Sea creatures need oxygen, as do fish and humans

Huhu huluhulu. Found: Mark Butler

It is important to understand the growth and development of these ancient creatures because they play important ecological functions in marine ecosystems, including corals.

The sponges are responsible for regulating the exchange of energy, volume, and nutrients between the surfaces through the filter and the food truck; increase the difficulty of living; replacement of sediment structures; gives underwater voices and provides food for spongivorous species.

“Sponges are also important in fishing,” says Dr. Nicola Smith, an author of the study and a researcher at UBC’s Institute for the Oceans and Fisheries. “In the Caribbean, the release of sea sponges began in the mid -1800s as being used for personal hygiene, house and car cleaning, bodybuilding, glassware, and so on. cleaning machinery, among other things.The sponges collected are dominated by cosmetic, biomedical and aquarium manufacturers.

Data from the Food and Agriculture Organization of the United Nations shows that about 40,000 tons of sponges were shipped by the two countries from 1950 to 2019, about 1 million tons in live weight.

“When it comes to the number of countries using the sponge number and their seizures, the FAO number is obvious,” said Dr. Smith’s place. “In addition, the effects of commercial fishing in sponge communities are not widely known. While in South Florida, harvesting is limited by the use of advanced fishing technologies. so much so that they fall. “

Following this research, the researchers will work together with other colleagues to create a detailed report of the reconstruction of commercial sponges arrests around the world.



More information:
Daniel Pauly et al, Growth and related characteristics of wool (Hippospongia lachne): critical thinking and perception. Fishing bulletin (2022). DOI: 10.7755 / FB.120.2.1 spo.nmfs.noaa.gov/sites/defaul… h-bull / 1202pauly.pdf

Given by the Sea all around us

Directions: Ocean sponges, like fish and humans, need oxygen (2022, March 30) Retrieved March 30, 2022 from https://phys.org/news/2022-03-sea-sponges -oxygen-fish-people.html

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