Understanding the Time series plots
Time series plots show the changes in each indicator as a function of time, over the period 1980-present. Each plot also shows horizontal lines that indicate the median (middle) value of that indicator, as well as the 10th and 90th percentiles, each calculated for the entire period of measurement. Time series plots were only developed for datasets with at least 10 years of data. Two symbols located to the right of each plot describe how recent values of an indicator compare against the overall series. A black circle indicates whether the indicator values over the last five years are on average above the series 90th percentile (plus sign), below the 10th percentile (minus sign), or between those two values (solid circle). Beneath that an arrow reflects the trend of the indicator over the last five years; an increase or decrease greater than one standard deviation is reflected in upward or downward arrows respectively, while a change of less than one standard deviation is recorded by a left-right arrow.
Marine mammal species listed as threatened or endangered under the Endangered Species Act
Alaska
Values Correspond to the Number of ESA Threatened or Endangered Species in a given region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries goes through required regulatory steps to list, reclassify, or delist a species under the ESA. For more information, see a step-by-step description of the ESA listing process. The listing process requires time and resources; as a result, the timing and number of listed marine species is not necessarily indicative of the actual number of currently endangered or threatened species and the exact timing of when these species became eligible to be listed under the ESA. Many marine species were initially listed when the ESA was passed in 1973; others have taken more time to be listed, and some have been reclassified or delisted since then.
Hawai'i-Pacific Islands
Values Correspond to the Number of ESA Threatened or Endangered Species in a given region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries goes through required regulatory steps to list, reclassify, or delist a species under the ESA. For more information, see a step-by-step description of the ESA listing process. The listing process requires time and resources; as a result, the timing and number of listed marine species is not necessarily indicative of the actual number of currently endangered or threatened species and the exact timing of when these species became eligible to be listed under the ESA. Many marine species were initially listed when the ESA was passed in 1973; others have taken more time to be listed, and some have been reclassified or delisted since then.
California Current
Values Correspond to the Number of ESA Threatened or Endangered Species in a given region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries goes through required regulatory steps to list, reclassify, or delist a species under the ESA. For more information, see a step-by-step description of the ESA listing process. The listing process requires time and resources; as a result, the timing and number of listed marine species is not necessarily indicative of the actual number of currently endangered or threatened species and the exact timing of when these species became eligible to be listed under the ESA. Many marine species were initially listed when the ESA was passed in 1973; others have taken more time to be listed, and some have been reclassified or delisted since then.
Southeast and Gulf of Mexico
Values Correspond to the Number of ESA Threatened or Endangered Species in a given region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries goes through required regulatory steps to list, reclassify, or delist a species under the ESA. For more information, see a step-by-step description of the ESA listing process. The listing process requires time and resources; as a result, the timing and number of listed marine species is not necessarily indicative of the actual number of currently endangered or threatened species and the exact timing of when these species became eligible to be listed under the ESA. Many marine species were initially listed when the ESA was passed in 1973; others have taken more time to be listed, and some have been reclassified or delisted since then.
Northeast
Values Correspond to the Number of ESA Threatened or Endangered Species in a given region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries goes through required regulatory steps to list, reclassify, or delist a species under the ESA. For more information, see a step-by-step description of the ESA listing process. The listing process requires time and resources; as a result, the timing and number of listed marine species is not necessarily indicative of the actual number of currently endangered or threatened species and the exact timing of when these species became eligible to be listed under the ESA. Many marine species were initially listed when the ESA was passed in 1973; others have taken more time to be listed, and some have been reclassified or delisted since then.
Marine mammal stocks considered strategic/depleted under the Marine Mammal Protection Act
Alaska
Values correspond to the number of MMPA Strategic or Depleted Marine Mammal Species listed each year in each region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries prepares marine mammal stock assessment reports to track the status of marine mammal stocks. Some marine mammal stocks are thriving, while others are declining, and we often don’t know all the reasons behind a species or stock’s population trend. Because of this variability, it is difficult to indicate the state of an ecosystem or specific region using stock assessment data for marine mammal species that often range across multiple ecosystems and regions.
Hawai'i-Pacific Islands
Values correspond to the number of MMPA Strategic or Depleted Marine Mammal Species listed each year in each region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries prepares marine mammal stock assessment reports to track the status of marine mammal stocks. Some marine mammal stocks are thriving, while others are declining, and we often don’t know all the reasons behind a species or stock’s population trend. Because of this variability, it is difficult to indicate the state of an ecosystem or specific region using stock assessment data for marine mammal species that often range across multiple ecosystems and regions.
California Current
Values correspond to the number of MMPA Strategic or Depleted Marine Mammal Species listed each year in each region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries prepares marine mammal stock assessment reports to track the status of marine mammal stocks. Some marine mammal stocks are thriving, while others are declining, and we often don’t know all the reasons behind a species or stock’s population trend. Because of this variability, it is difficult to indicate the state of an ecosystem or specific region using stock assessment data for marine mammal species that often range across multiple ecosystems and regions.
Southeast and Gulf of Mexico
Values correspond to the number of MMPA Strategic or Depleted Marine Mammal Species listed each year in each region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries prepares marine mammal stock assessment reports to track the status of marine mammal stocks. Some marine mammal stocks are thriving, while others are declining, and we often don’t know all the reasons behind a species or stock’s population trend. Because of this variability, it is difficult to indicate the state of an ecosystem or specific region using stock assessment data for marine mammal species that often range across multiple ecosystems and regions.
Northeast
Values correspond to the number of MMPA Strategic or Depleted Marine Mammal Species listed each year in each region
Data Interpretation
Gauge and Trend Analyses were not appropriate for marine mammal data.
Data Background and Caveats
NOAA Fisheries prepares marine mammal stock assessment reports to track the status of marine mammal stocks. Some marine mammal stocks are thriving, while others are declining, and we often don’t know all the reasons behind a species or stock’s population trend. Because of this variability, it is difficult to indicate the state of an ecosystem or specific region using stock assessment data for marine mammal species that often range across multiple ecosystems and regions.
Resources
Directory of Endangered and Threatened species
NOAA Fisheries has jurisdiction over 165 endangered and threatened marine species (80 endangered; 85 threatened), including 66 foreign species (40 endangered; 26 threatened). This website serves as a directory for them.
Marine Mammal Stock Assessments
Assessing marine mammal stocks gives us valuable information on population trends, productivity rates, estimates of human-caused mortality and other sources of serious injury, and more. These assessments allow us to evaluate the effectiveness of conservation and recovery measures, and to adjust management approaches as needed.